Appendix Table 1.  Summaries of Total Dissolved Inorganic Carbon Data
                      for Certified Reference Materials

    Tables 1A to 1L summarize DIC measurements on water from bottles of 
Certified Reference Materials (CRM's) prepared in the laboratory of Dr. Andrew 
Dickson of SIO. These measurements constitute the certification of the 12  
batches of CRM's, numbered Batch 1 to Batch 13 ( DIC measurements were not
made on Batch 9 ). Not all of these batches were used as CRM's for shipboard  
DIC measurements. Natural sea water Batches 4 and 5 proved to be contaminated 
biologically. During solution of the contamination problem, Batches 6, 7 and  
later 11 were made of "artificial sea water", mixtures of sodium bicarbonate
in a sodium chloride solution matrix. With Batch 10, uncontaminated batches of 
natural sea water stable for DIC were again produced.

    Comments on each column in the table follow:

ANAL            The date of manometric analysis of the CO2 gas extraction.
DATE

ANAL            The manometric analysis system used to measure the CO2 gas  
SYST            extraction: M, the mercury manometer; and S, the Ruska XR38 
                quartz spiral manometric system. A number of samples were
                analyzed on both systems, first on the mercury and then on
                the quartz spiral. Beginning with Batch 11, CRM's were  
                measured only on the mercury system.

SAMPLE          The number refers to the bottle number assigned by the Dickson
BOTTLE          laboratory: it corresponds to the order of filling of that
                bottle in its batch. The "P" and the following letter are 
                codes for SIO laboratory use.

RUN             This refers to multiple manometric analyses of the same gas 
                extraction. There are none in this data set. On the page with
                CRM Batch 2, bottle 143PB has two runs labelled 001B and 001A.
                These are "subruns", where the sample was measured twice but not
                transferred out of the mercury manometer between measurements.

FLAG            Very bad results are flagged with "EX" and omitted from
                consideration in calculation of averages, etc.

INDIV           The individual DIC result for each bottle.

AV(M)           The average DIC of all unflagged mercury manometric 
                measurements.

STDEV(M)        The sample standard deviation calculated from the mercury
                manometric results, along with the number of mercury
                manometric results averaged.

AV(S)           The average DIC of all unflagged quartz spiral manometric 
                measurements.

STDEV(S)        The sample standard deviation calculated from the quartz spiral
                manometric results, along with the number of quartz
                spiral manometric results averaged.