Table 7. The mean analytical difference (TCO₂ = measured - certified) and the standard deviation of the differences between measured and certified TCO₂ on WOCE Section P6.

Leg	System*	CRM(Batch)	TCO₂(µmol/kg)	St. Dev.(µmol/kg)	n
P6E	004	10, 11	-0.37	1.37	48
P6C	004	10, 11	+0.04	1.72	86
Total/Mean			-0.11	1.61	134
P6E	006	10, 11	+0.52	1.35	43
P6C	006	10, 11	-0.43	1.43	75
P6W	006	10, 11	-0.54	1.06	41
Total/Mean			-0.20	1.39	159
Overall/Total/Mean			-0.16	1.49	293

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Table 7. The mean analytical difference (TCO2 = measured - certified) and the standard deviation of the differences between measured and certified TCO2 on WOCE Section P6.