Shore-Based Replicate Measurements

The replicate samples from 56 Niskin bottles at 18 stations were collected for shore-based reference analyses at the laboratory of C. D. Keeling of SIO. The TCO2 measurements were produced by vacuum-extraction/manometric analysis, and the TALK values, by potentiometric titration. Both measurements were performed under controlled laboratory conditions using standards. The replicate sample standard deviation (s) for this large data set of 50 unflagged pairs is 1.9 µmol/kg after the three replicate pairs with deltas greater then 3s (a replicate sample standard deviation calculated from the set of analyses on duplicate samples) were omitted (Guenther et al. 1994). Figure 3 displays the performance of the replicate sampling program during TUNES Leg 1 for a subset of all data including only near surface (0-10 m) and deep (~3000 m) data. Two data points with replicate sample singlets are omitted, as well as one with a ship-minus-shore difference of -30.6 µmol/kg and one with a replicate delta greater than 4.0 µmol/kg (Guenther et al. 1994).

For the 17 comparisons, the replicate s is 0.9 µmol/kg, similar to the s calculated for the entire data set. Figure 3 illustrates that the near-surface data are in better agreement than the deep data. Because 12 of the 17 comparisons are between values for surface data, their better agreement weighs the subset and produces lack of agreement with the entire data set. Figure 3 illustrates better performance of the replicate sampling program at the onset of TUNES-1, with more scatter of the data evident towards the end of the leg (Guenther et al. 1994).

Tables 1 and 2, reprinted from Guenther et al. 1994, summarize the replicate shore-based measurements of TCO2 and TALK and their comparisons with shipboard measurements.

Table 1. Summary of TCO2 replicate data collected during R/V Thomas Washington TUNES-1 Expedition

THE CARBON DIOXIDE PROJECT OF THE SCRIPPS INSTITUTION OF OCEANOGRAPHY                                                    
     TUNES Leg 1   1991 Pacific WOCE Line P17C                                
     -----------------------------------------
     
    SUMMARY OF DISSOLVED INORGANIC CARBON DATA
     
                                                                                   S.I.O.    RUN   BOTTLE  BOTTLE "NISKIN"  WHOI    WHOI
      LEG   LAT.   CAST  DEPTH  SAMPLE  EXTRAC ANALYSIS MANO SAMPLE                 RUN     DELTA    DIC    DELTA    AVG    DIC   -S.I.O.
      STN   LONG.  NISK   (M)    DATE    DATE    DATE   TYPE BOTTLE  RUN    FLAG   ----------------- (�MOLES/KG SW) ---------------------
     
        1   35-33N  1  1    1  03JUN91 20AUG91 22AUG91    S  S3750   001           1982.51         1982.51                               
         5 122-52W                     21AUG91 22AUG91    S  S3751   001           1983.22         1983.22   +0.71 1982.86               
                                                                                                                                         
        1   34-49N  1  1    1  04JUN91 21AUG91 22AUG91    S  S3772   001           1984.63         1984.63                               
         8 124-35W                     22AUG91 22AUG91    S  S3773   001           1982.71         1982.71   -1.92 1983.67               
                                                                                                                                         
                    1  3   66          21AUG91 22AUG91    S  S3770   001           2027.65         2027.65                               
                                       21AUG91 22AUG91    S  S3771   001           2028.92         2028.92   +1.27 2028.29               
 
        1   34-35N  1 29 2896  05JUN91 22AUG91 28AUG91    S  S3774   001           2377.63         2377.63         2377.63               
        11 127-38W                                                                                                                       
                                                                                                                                         
        1   34-35N  1  1    2  07JUN91 22AUG91 28AUG91    S  S3781   001           1993.44         1993.44                               
        14 131-19W                     23AUG91 28AUG91    S  S3782   001           1986.40         1986.40   -7.04 1989.92               
                                                                                                                                         
        1   34-36N  2  1    1  08JUN91 09SEP91 12SEP91    S  S3806   001           1988.39         1988.39                               
        17 134-58W                     10SEP91 12SEP91    S  S3807   001           1988.47         1988.47   +0.08 1988.43 1987.4  -1.03 
                                                                                                                                         
                    2  2   52          10SEP91 12SEP91    S  S3804   001           1982.28         1982.28                               
                                       09SEP91 12SEP91    S  S3805   001           1984.65         1984.65   +2.37 1983.47 1982.5  -0.97 
                                                                                                                                         
                    2  4   98          09SEP91 12SEP91    S  S3802   001           1993.50         1993.50         1993.50 1975.9 -17.60 
                                                                                                                                         
                    2  8  201          29AUG91 29AUG91    S  S3800   001           2098.60         2098.60                               
                                       29AUG91 29AUG91    S  S3801   001           2107.24         2107.24   +8.64 2102.92 2096.8  -6.12 
                                                                                                                                         
                    2 10  300          28AUG91 29AUG91    S  S3798   001           2179.95         2179.95                               
                                       28AUG91 29AUG91    S  S3799   001           2180.55         2180.55   +0.60 2180.25 2177.6  -2.65 
                                                                                                                                         
                    2 12  401          26AUG91 29AUG91    S  S3796   001           2235.29         2235.29                               
                                       26AUG91 29AUG91    S  S3797   001           2234.32         2234.32   -0.97 2234.81 2225.6  -9.21 
                                                                                                                                         
                    2 14  601          26AUG91 28AUG91    S  S3794   001           2309.78         2309.78                               
                                       26AUG91 29AUG91    S  S3795   001           2311.76         2311.76   +1.98 2310.77 2302.8  -7.97 
                                                                                                                                         
                    2 17  899          26AUG91 28AUG91    S  S3792   001           2365.29         2365.29                               
                                       26AUG91 28AUG91    S  S3793   001           2367.90         2367.90   +2.61 2366.59 2351.1 -15.49 
                                                                                                                                         
                    2 19 1200          23AUG91 28AUG91    S  S3790   001           2373.67         2373.67                               
                                       23AUG91 28AUG91    S  S3791   001           2373.97         2373.97   +0.30 2373.82               
                                                                                                                                         
                    2 21 1600          23AUG91 28AUG91    S  S3788   001           2377.93         2377.93                               
                                                                                                                                        
        1   33- 4N  1  1    1  09JUN91 20SEP91 26SEP91    S  S3810   001           2002.42         2002.42                               
        20 135-00W                     20SEP91 26SEP91    S  S3811   001           2002.10         2002.10   -0.32 2002.26 2001.0  -1.26 
                                                                                                                                         
                    1 28 2798          17SEP91 20SEP91    S  S3808   001           2362.65         2362.65                               
                                       19SEP91 20SEP91    S  S3809   001           2362.85         2362.85   +0.20 2362.75 2359.1  -3.65 
                                                                                                                                         
        1   31-32N  1  1    0  10JUN91 24SEP91 26SEP91    S  S3814   001           2007.87         2007.87                               
        23 135- 0W                     24SEP91 26SEP91    S  S3815   001           2010.70         2010.70   +2.83 2009.29 2012.5   3.21 
                                                                                                                                         
                    1 28 3003          24SEP91 26SEP91    S  S3813   001           2356.61         2356.61         2356.61 2353.5  -3.11 
                                                                                                                                         
        1   30- 2N  2  1    1  11JUN91 19AUG91 22AUG91    S  R4478   001           2021.92         2021.92                               
        26 134-57W                     19AUG91 22AUG91    S  R4479   001           2020.63         2020.63   -1.29 2021.28 2022.3   1.02 
 
                    2  2   64          09AUG91 12AUG91    S  R4476   001           2031.34         2031.34                               
                                       09AUG91 12AUG91    S  R4477   001           2027.18         2027.18   -4.16 2029.26 2020.8  -8.46 
                                                                                                                                         
                    2  4  109          08AUG91 12AUG91    S  R4474   001           2032.43         2032.43                               
                                       08AUG91 12AUG91    S  R4475   001           2030.79         2030.79   -1.64 2031.61 2021.7  -9.91 
                                                                                                                                         
                    2  7  206          06AUG91 07AUG91    S  R4472   001           2044.07         2044.07                               
                                       08AUG91 12AUG91    S  R4473   001           2043.64         2043.64   -0.43 2043.85 2041.7  -2.15 
                                                                                                                                         
                    2 10  324          06AUG91 07AUG91    S  R4470   001           2099.91         2099.91                               
                                       06AUG91 07AUG91    S  R4471   001           2099.87         2099.87   -0.04 2099.89 2099.3  -0.59 
                                                                                                                                         
                    2 11  400          05AUG91 07AUG91    S  R4468   001    EX     2166.40                                               
                                       05AUG91 07AUG91    S  R4469   001           2149.91         2149.91         2149.91 2146.1  -3.81 
                                                                                                                                         
                    2 13  606          05AUG91 07AUG91    S  R4466   001           2283.85         2283.85                               
                                       05AUG91 07AUG91    S  R4467   001           2284.53         2284.53   +0.68 2284.19 2282.1  -2.09 
                                                                                                                                         
                    2 16  909          26SEP91 26SEP91    S  S3824   001           2354.87         2354.87                               
                                       26SEP91 26SEP91    S  S3825   001           2354.57         2354.57   -0.30 2354.72 2351.5  -3.22 
          
                    2 18 1202          27SEP91 02OCT91    S  S3822   001           2374.15         2374.15                               
                                       27SEP91 02OCT91    S  S3823   001           2370.18         2370.18   -3.97 2372.17 2365.6  -6.57 
                                                                                                                                         
                    2 20 1605          25SEP91 26SEP91    S  S3820   001           2372.06         2372.06                               
                                       27SEP91 02OCT91    S  S3821   001           2371.81         2371.81   -0.25 2371.94 2368.7  -3.24 
                                                                                                                                          
                    2 22 2007  11JUN91 25SEP91 26SEP91    S  S3818   001           2366.87         2366.87                               
                                       26SEP91 26SEP91    S  S3819   001           2372.19         2372.19   +5.32 2369.53 2366.7  -2.83 
                                                                                                                                         
                    2 27 3000          25SEP91 26SEP91    S  S3816   001           2356.27         2356.27                               
                                       25SEP91 26SEP91    S  S3817   001           2356.34         2356.34   +0.07 2356.31 2355.6  -0.71 
                                                                                                                                         
        1   28-30N  1  1    1  12JUN91 20AUG91 22AUG91    S  R4482   001           2021.52         2021.52                               
        29 135-00W                     20AUG91 22AUG91    S  R4483   001           2022.63         2022.63   +1.11 2022.08 2020.5  -1.58 
                                                                                                                                         
                    1 31 2951          20AUG91 22AUG91    S  R4480   001           2382.18         2382.18                               
                                       20AUG91 22AUG91    S  R4481   001           2378.02         2378.02   -4.16 2380.10 2349.5 -30.60 
                                                                                                                                         
        1   19-30N  1  1    0  18JUN91 10SEP91 12SEP91    S  R4486   001           1979.78         1979.78                               
        47 135- 0W                     10SEP91 13SEP91    S  R4487   001           1979.01         1979.01   -0.77 1979.40 1976.7  -2.70 
                                                                                                                                         
                    1 27 3005          10SEP91 12SEP91    S  S3884   001           2350.86         2350.86                               
                                       10SEP91 12SEP91    S  S3885   001           2351.54         2351.54   +0.68 2351.20 2342.6  -8.60 
                                                                                                                                         
        1   18- 0N  1  1    0  19JUN91 11SEP91 13SEP91    S  R4490   001           1950.81         1950.81                               
        50 135- 0W                     11SEP91 13SEP91    S  R4491   001           1951.11         1951.11   +0.30 1950.96 1947.8  -3.16 
           
                    1 27 2999          11SEP91 13SEP91    S  R4488   001           2368.76         2368.76         2368.76 2347.1 -21.66 
                                                                                                                                         
        1   16-30N  1  1    0  20JUN91 02OCT91 02OCT91    S  S3894   001           1944.28         1944.28                               
        53 135- 0W                     04OCT91 10OCT91    S  S3895   001           1946.88         1946.88   +2.60 1945.58 1945.0  -0.58 
                                                                                                                                         
                    1  2   50          01OCT91 02OCT91    S  S3892   001           1944.71         1944.71                               
                                       01OCT91 02OCT91    S  S3893   001           1943.80         1943.80   -0.91 1944.26 1943.7  -0.56 
                                                                                                                                         
                    1  4  112          30SEP91 02OCT91    S  S3890   001           2018.80         2018.80                               
                                       30SEP91 02OCT91    S  S3891   001           2018.45         2018.45   -0.35 2018.63 2017.3  -1.33 
                                                                                                                                         
                    1  8  188          30SEP91 02OCT91    S  S3888   001           2159.93         2159.93                               
                                       30SEP91 02OCT91    S  S3889   001           2160.18         2160.18   +0.25 2160.05 2159.1  -0.95 
                                                                                                                                         
                    1 10  300          26SEP91 02OCT91    S  S3886   001           2261.14         2261.14                               
                                       27SEP91 02OCT91    S  S3887   001           2260.40         2260.40   -0.74 2260.77 2259.3  -1.47 
                                                                                                                                         
                    1 12  402          19SEP91 20SEP91    S  R4504   001           2287.13         2287.13                               
                                       19SEP91 20SEP91    S  R4505   001           2284.44         2284.44   -2.69 2285.78 2281.5  -4.28 
                    1 14  597  20JUN91 18SEP91 20SEP91    S  R4502   001           2314.33         2314.33                               
                                       18SEP91 20SEP91    S  R4503   001           2316.53         2316.53   +2.20 2315.43 2306.8  -8.63 
                                                                                                                                         
                    1 17  904          17SEP91 20SEP91    S  R4500   001           2343.16         2343.16                               
                                       17SEP91 20SEP91    S  R4501   001           2342.63         2342.63   -0.53 2342.90 2337.4  -5.50 
                                                                                                                                         
                    1 19 1205          16SEP91 20SEP91    S  R4498   001           2360.09         2360.09  
                                       17SEP91 20SEP91    S  R4499   001           2359.18         2359.18   -0.91 2359.64 2350.7  -8.94 
                                                                                                                                         
                    1 21 1602          13SEP91 13SEP91    S  R4496   001           2369.00         2369.00         2369.00 2359.2  -9.80 
                                                                                                                                         
                    1 23 2008          13SEP91 13SEP91    S  R4494   001           2368.43         2368.43                               
                                       13SEP91 13SEP91    S  R4495   001           2367.86         2367.86   -0.57 2368.15               
                                                                                                                                         
                    1 28 3000          12SEP91 13SEP91    S  R4492   001           2357.88         2357.88                               
                                       13SEP91 13SEP91    S  R4493   001           2353.83         2353.83   -4.05 2355.85 2349.2  -6.65 
                                                                                                                                         
        1    6- 0N  1  1   -1  26JUN91 05DEC91 05DEC91    M  R4522   001           1914.53         1914.53                               
        74 135-00W                     05DEC91 12DEC91    S  R4522   001           1915.16         1915.16                               
                                       05DEC91 06DEC91    M  R4523   001           1916.39         1916.39   +1.86 1915.46 1915.8   0.34 
                                       05DEC91 12DEC91    S  R4523   001           1916.71         1916.71   +1.55 1915.94 1915.8  -0.14 
                                                                                                                                         
                    1 29 2992          05DEC91 05DEC91    M  R4520   001           2353.96         2353.96                               
                                       05DEC91 09DEC91    S  R4520   001           2353.74         2353.74                               
                                       05DEC91 05DEC91    M  R4521   001           2354.24         2354.24   +0.28 2354.10 2358.3   4.20 
                                       05DEC91 09DEC91    S  R4521   001           2354.81         2354.81   +1.07 2354.28 2358.3   4.02 
                                                                                                                                         
        1    1-00S  1  1    0  03JUL91 09DEC91 10DEC91    M  S3986   001           2017.01         2017.01      
       104 135- 0W                     09DEC91 13DEC91    S  S3986   001           2017.31         2017.31                               
                                       09DEC91 10DEC91    M  S3987   001           2016.77         2016.77   -0.24 2016.89 2015.6  -1.29 
                                       09DEC91 13DEC91    S  S3987   001           2016.76         2016.76   -0.55 2017.04 2015.6  -1.44 
                                                                                                                                         
                    1 30 2999          06DEC91 06DEC91    M  R4544   001           2340.10         2340.10                               
                                       06DEC91 12DEC91    S  R4544   001           2339.57         2339.57                               
                                       06DEC91 06DEC91    M  R4545   001           2342.51         2342.51   +2.41 2341.31 2334.5  -6.81 
                                       06DEC91 12DEC91    S  R4545   001           2342.36         2342.36   +2.79 2340.97 2334.5  -6.47 
                                                                                                                                         
        1    1-58S  1 30 2998  04JUL91 06DEC91 06DEC91    M  S3988   001           2332.03         2332.03                               
       110 135- 0W                     06DEC91 12DEC91    S  S3988   001           2331.71         2331.71                               
                                       06DEC91 06DEC91    M  S3989   001           2331.95         2331.95   -0.08 2331.99 2330.2  -1.79 
                                       06DEC91 12DEC91    S  S3989   001           2332.40         2332.40   +0.69 2332.05 2330.2  -1.85 
                                                                                                                                         
        1    4-00S  1  1    0  05JUL91 10DEC91 10DEC91    M  S4019   001           2004.84         2004.84                               
       119 135- 0W                     10DEC91 13DEC91    S  S4019   001           2006.22         2006.22                               
                                       10DEC91 11DEC91    M  S4020   001           2004.38         2004.38   -0.46 2004.61 2006.1   1.49 
                                       10DEC91 13DEC91    S  S4020   001           2006.65         2006.65   +0.43 2006.44 2006.1  -0.34 
                                                                                                                                         
                    1 29 3001          10DEC91 10DEC91    M  S4017   001           2329.60         2329.60                               
                                       10DEC91 13DEC91    S  S4017   001           2328.97         2328.97                               
                                       10DEC91 10DEC91    M  S4018   001           2327.62         2327.62   -1.98 2328.61               
                                       10DEC91 13DEC91    S  S4018   001           2327.83         2327.83   -1.14 2328.40               
                                                                                                                                                                                                                                                                                  
     
     -----------------------------------------------------------------------------------------------------------------------------------
     MANOMETER TYPE:                                                 FLAGS:
       S = QUARTZ SPIRAL MANOMETER DATUM                               F: No Hg found in bottle                                          
       M = CONSTANT VOLUME MERCURY MANOMETER DATUM                     G: Severe bottle leak                                             
     BOTTLE TYPE:                                                     EX: Data excluded from analysis                                    
        R = RODAVISS    S = S TYPE                                                                                                       
     
      NOTE: Dilution factor of 1.000170 has been applied.

Table 2. Summary of TALK replicate data collected during R/V Thomas Washington TUNES-1 Expedition

     THE CARBON DIOXIDE PROJECT OF THE SCRIPPS INSTITUTION OF OCEANOGRAPHY                                                     
     TUNES Leg 1   1991 Pacific WOCE Line P17C                                
     -----------------------------------------                                                                                           
     
  SUMMARY OF ALKALINITY DATA
     
                                                                                   S.I.O.   TRIAL  BOTTLE  BOTTLE "NISKIN"  WHOI   WHOI
      LEG   LAT.   CAST  DEPTH  SAMPLE         ANALYSIS TITR SAMPLE         FLAG   TRIAL    DELTA    ALK    DELTA    AVG    ALK   -S.I.O.
      STN   LONG.  NISK   (M)    DATE            DATE   SYST BOTTLE  TRIAL         ----------------- (�EQUIV/KG SW) ---------------------
     
        1   35-33N  1  1    1  03JUN91         22AUG91    G  S3750      1          2204.15         2204.15                               
         5 122-52W                             29AUG91    G  S3751      1          2205.13         2205.13   +0.98 2204.64               
                                                                                                                                         
        1   34-49N  1  1    1  04JUN91         22AUG91    G  S3772      1   EX     2316.17          
         8 124-35W                             22AUG91    G  S3772      2          2209.65         2209.65                               
                                               22AUG91    G  S3773      1          2203.60         2203.60   -6.05 2206.63               
                                                                                                                                         
                    1  3   66                  29AUG91    G  S3770      1          2220.45         2220.45                               
                                               30AUG91    G  S3771      1          2219.65         2219.65   -0.80 2220.05               
                                                                                                                                         
        1   34-35N  1 29 2896  05JUN91         30AUG91    G  S3774      1          2435.74         2435.74         2435.74               
        11 124-35W                                                                                                                       
                                                                                                                                         
        1   34-35N  1  1    2  07JUN91         30AUG91    G  S3781      1          2218.35         2218.35                               
        14 131-19W                             23AUG91    G  S3782      1          2217.58         2217.58   -0.77 2217.97               
                                                                                                                                         
        1   34-36N  2  1    1  08JUN91         10SEP91    G  S3806      1          2220.01         2220.01                               
        17 134-58W                             10SEP91    G  S3807      1          2218.75         2218.75   -1.26 2219.38 2240.88  21.50
                                                                                                                                         
                    2  2   52                  11SEP91    G  S3804      1   X      2222.88                                               
                                               09SEP91    G  S3805      1          2217.63         2217.63         2217.63 2228.51  10.88
                                                                                                                                         
                    2  4   98                  09SEP91    G  S3802      1          2223.61         2223.61                               
                                               09SEP91    G  S3803      1          2222.49         2222.49   -1.12 2223.05               
                                                                                                                                         
                    2  8  201                  30AUG91    G  S3800      1          2228.37         2228.37                            
                                               30AUG91    G  S3801      1          2224.11         2224.11   -4.26 2226.24 2237.92  11.68
                                                                                                                                         
                    2 10  300                  28AUG91    G  S3798      1          2265.57         2265.57                               
                                               28AUG91    G  S3799      1          2266.51         2266.51   +0.94 2266.04 2285.16  19.12
                                                                                                                                         
                    2 12  401                  28AUG91    G  S3796      1          2285.54         2285.54                               
                                               28AUG91    G  S3797      1          2281.77         2281.77   -3.77 2283.66               
                                                                                                                                         
                    2 14  601                  26AUG91    G  S3794      1          2315.58         2315.58                               
                                               28AUG91    G  S3795      1   EX     2333.46                                               
                                               28AUG91    G  S3795      2   EX     2325.05                         2315.58               
                                                                                                                                         
                    2 17  899                  26AUG91    G  S3792      1          2364.40         2364.40                               
                                               26AUG91    G  S3793      1          2364.20         2364.20   -0.20 2364.30               
                                                                                                                                         
                    2 19 1200                  30AUG91    G  S3790      1          2398.41         2398.41                               
                                               30AUG91    G  S3791      1          2390.65         2390.65   -7.76 2394.53               
                                                                                                                                             
                    2 21 1600  08JUN91         30AUG91    G  S3788      1          2411.69         2411.69                               
                                               30AUG91    G  S3789      1          2411.69         2411.69   +0.00 2411.69               
                                                                                                                                         
        1   33- 4N  1  1    1  09JUN91         20SEP91    G  S3810      1          2248.16         2248.16                               
        20 135-00W                             25SEP91    G  S3811      1          2247.08         2247.08   -1.08 2247.62 2257.66  10.04
                                                                                                                                         
                    1 28 2798                  17SEP91    G  S3808      1   EX     2432.87                                               
                                               19SEP91    G  S3809      1          2443.29         2443.29         2443.29               

        1   31-32N  1  1    0  10JUN91         25SEP91    G  S3814      1          2271.47         2271.47                               
        23 135- 0W                             25SEP91    G  S3815      1          2268.13         2268.13   -3.34 2269.80               
                                                                                                                                         
                    1 28 3003                  25SEP91    G  S3812      1          2433.30         2433.30                               
                                               25SEP91    G  S3813      1          2433.64         2433.64   +0.34 2433.47               
                                                                                                                                         
        1   30- 2N  2  1    1  11JUN91         20AUG91    G  R4478      1          2293.17         2293.17                               
        26 134-57W                             20AUG91    G  R4479      1          2300.12         2300.12   +6.95 2296.65 2312.16  15.51
                                                                                                                                         
                    2  2   64                  09AUG91    G  R4476      1          2300.65         2300.65                               
                                               13AUG91    G  R4477      1          2301.02         2301.02   +0.37 2300.83 2310.21   9.38
                                                                                                                                         
                    2  4  109                  09AUG91    G  R4474      1          2305.69         2305.69                               
                                               12AUG91    G  R4475      1          2302.70         2302.70   -2.99 2304.20 2311.85   7.65
                                                                                                                                         
                    2  7  206                  06AUG91    G  R4472      1          2265.51         2265.51                               
                                               09AUG91    G  R4473      1          2264.61         2264.61   -0.90 2265.06 2277.49  12.43
                                                                                                                                         
                    2 10  324                  06AUG91    G  R4470      1          2256.03         2256.03                               
                                               06AUG91    G  R4471      1          2256.65         2256.65   +0.62 2256.34 2262.15   5.81                                                                                                                                                                                                                                                             
                    2 11  400                  12AUG91    G  R4468      1          2261.41         2261.41                               
                                               12AUG91    G  R4469      1          2262.53         2262.53   +1.12 2261.97 2276.06  14.09
                                                                                                                                         
                    2 13  606                  05AUG91    G  R4466      1          2304.68         2304.68                               
                                               06AUG91    G  R4467      1          2304.19         2304.19   -0.49 2304.44               
                                                                                                                                         
                    2 16  909                  30SEP91    G  S3824      2          2355.35         2355.35                               
                                               26SEP91    G  S3825      1          2323.83         2323.83  -31.52 2339.59               
                                                                                                                                         
                    2 18 1202                  30SEP91    G  S3822      1          2393.21         2393.21                               
                                               02OCT91    G  S3823      1          2385.28         2385.28   -7.93 2389.25               
                    2 20 1605  11JUN91         26SEP91    G  S3820      1          2407.50         2407.50                               
                                               01OCT91    G  S3821      1          2407.56         2407.56   +0.06 2407.53               
                                                                                                                                         
                    2 22 2007                  02OCT91    G  S3818      1          2414.88         2414.88                               
                                               26SEP91    G  S3819      1          2417.05         2417.05   +2.17 2415.97               
                                                                                                                                         
                    2 27 3000                  25SEP91    G  S3816      1          2439.46         2439.46                               
                                               25SEP91    G  S3817      1          2432.16         2432.16   -7.30 2435.81               
                                                                                                                                         
        1   28-30N  1  1    1  12JUN91         21AUG91    G  R4482      1          2294.95         2294.95                               
        29 135-00W                             21AUG91    G  R4483      1          2290.86         2290.86   -4.09 2292.91 2306.02  13.11
                                                                                                                                         
                    1 31 2951                  20AUG91    G  R4480      1          2442.89         2442.89                               
                                               20AUG91    G  R4481      1   X      2432.56                                               
                                               21AUG91    G  R4481      2          2435.40         2435.40   -7.49 2439.15               
                                                                                                                                            
        1   19-30N  1  1    0  18JUN91         10SEP91    G  R4486      1          2290.66         2290.66                               
        47 135- 0W                             10SEP91    G  R4487      1          2294.47         2294.47   +3.81 2292.56 2298.90   6.34
                                                                                                                                         
                    1 27 3005                  10SEP91    G  S3884      1          2435.33         2435.33                               
                                               10SEP91    G  S3885      1          2434.26         2434.26   -1.07 2434.80               
                                                                                                                                         
        1   18- 0N  1  1    0  19JUN91         11SEP91    G  R4490      1          2269.78         2269.78                               
        50 135- 0W                             11SEP91    G  R4491      1          2277.37         2277.37   +7.59 2273.58 2282.90   9.32
                                                                                                                                         
                    1 27 2999                  11SEP91    G  R4488      1          2396.89         2396.89                               
                                               12SEP91    G  R4489      1          2393.93         2393.93   -2.96 2395.41               
                                                                                                                                         
        1   16-30N  1  1    0  20JUN91         23OCT91    G  S3894      1          2272.47         2272.47                               
        53 135- 0W                             23OCT91    G  S3895      1          2272.31         2272.31   -0.16 2272.39 2254.90 -17.49
                                                                                                                                         
                    1  2   50                  22OCT91    G  S3893      1          2270.20         2270.20         2270.20 2286.90  16.70
                                                                                                                                         
                    1  4  112                  02OCT91    G  S3890      1          2294.04         2294.04                               
                                               22OCT91    G  S3891      1          2298.05         2298.05   +4.01 2296.05 2316.90  20.85
                                                                                                                                         
                    1  8  188                  01OCT91    G  S3888      1          2266.82         2266.82              
                                               02OCT91    G  S3889      1          2263.21         2263.21   -3.61 2265.02 2270.60   5.58
                                                                                                                                         
                    1 10  300                  01OCT91    G  S3886      1          2293.99         2293.99                               
                                               02OCT91    G  S3887      1          2294.72         2294.72   +0.73 2294.35 2300.90   6.55
                                                                                                                                         
                    1 12  402                  19SEP91    G  R4504      1          2304.53         2304.53                               
                    1 14  597  20JUN91         19SEP91    G  R4502      1          2328.49         2328.49                               
                                               19SEP91    G  R4503      1          2323.91         2323.91   -4.58 2326.20 2330.90   4.70
                                                                                                                                         
                    1 17  904                  17SEP91    G  R4500      1          2363.87         2363.87                               
                                               17SEP91    G  R4501      1          2360.56         2360.56   -3.31 2362.22               
                                                                                                                                         
                    1 19 1205                  19SEP91    G  R4498      1          2370.66         2370.66                               
                                               19SEP91    G  R4499      1          2377.91         2377.91   +7.25 2374.28               
                                                                                                                                         
                    1 21 1602                  18SEP91    G  R4496      1          2407.97         2407.97         2407.97               
                                                                                                                                         
                    1 23 2008                  13SEP91    G  R4494      1   EX     2428.50                                               
                                               18SEP91    G  R4494      2          2417.21         2417.21                               
                                               17SEP91    G  R4495      1          2417.42         2417.42   +0.21 2417.31               
                                                                                                                                         
                    1 28 3000                  12SEP91    G  R4492      1          2424.59                                               
                                               13SEP91    G  R4492      2          2424.81  +0.22  2424.70                               
                                               13SEP91    G  R4493      1          2439.80         2439.80  +15.10 2432.25               
                                                                                                                                         
        1    6- 0N  1  1   -1  26JUN91         09JAN92    V  R4522      1          2255.26         2255.26                               
        74 135-00W                             09JAN92    V  R4523      1          2268.50         2268.50  +13.24 2261.88 2251.00 -10.88
                                                                                                                                         
                    1 29 2992                  09JAN92    V  R4520      1          2436.85         2436.85                               
                                               09JAN92    V  R4521      1          2429.18         2429.18   -7.67 2433.02               
                                                                                                                                         
        1    1-00S  1  1    0  03JUL91         13JAN92    V  S3986      1          2324.91         2324.91                               
       104 135- 0W                             13JAN92    V  S3987      1          2324.52         2324.52   -0.39 2324.72 2328.50   3.78
                                                                                                                                         
                    1 30 2999                  13JAN92    V  R4544      1          2418.96         2418.96                               
                                               13JAN92    V  R4545      1          2416.92         2416.92   -2.04 2417.94               
                                                                                                                                         
        1    1-58S  1 30 2998  04JUL91         17JAN92    V  S3988      1          2425.00         2425.00                               
       110 135- 0W                             17JAN92    V  S3989      1          2421.67         2421.67   -3.33 2423.33               
                                                                                                                                         
        1    4-00S  1  1    0  05JUL91         20JAN92    V  S4019      1          2321.88         2321.88                               
       119 135- 0W                             20JAN92    V  S4020      1          2320.64         2320.64   -1.24 2321.26 2331.10   9.84
                                                                                                                                         
                    1 29 3001                  28JAN92    V  S4017      2          2420.98         2420.98                               
                                               28JAN92    V  S4018      2          2422.30         2422.30   +1.32 2421.64               
          
     
     -----------------------------------------------------------------------------------------------------------------------------
     TITRATION SYSTEM:                                                    FLAGS:
      G = GRAVIMETRIC                                                        F: No Hg found in bottle
      V = VOLUMETRIC                                                         X: Titrator malfunction
     BOTTLE TYPE:                                                           EX: Data excluded from analysis
       R = RODAVISS   S = S TYPE
     
      NOTE:  Dilution factor of 1.000170 has been applied.

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