Proc. IODP, 304/305, Methods

Table T10. Analytical reproducibility and accuracy of volatile analyses, Expedition 304.

Standard	Date	Sample	Average		Standard deviation
Standard	Date	Sample	CO₂	H₂O	CO₂	H₂O
JP-1	26 Nov 2004	1	0.29	2.48	0.011	0.298
	3 Dec 2004	1	0.31	2.27	0.004	0.032
	4 Dec 2004	1	0.28	2.65	0.007	0.024
	11 Dec 2004	1	0.30	2.42	0.009	0.076
	12 Dec 2004	1	0.23	2.29	0.024	0.140
	14 Dec 2004	1	0.30	2.18	0.009	0.029
		2	0.32	2.80	0.058	0.406
	16 Dec 2004	1	0.26	2.00	0.006	0.072
	23 Dec 2004	1	0.29	2.40	0.008	0.186
	26 Dec 2004	1	0.29	2.12	0.011	0.079
	28 Dec 2004	1	0.28	2.22	0.010	0.028
	29 Dec 2004	1	0.27	2.44	0.004	0.127
	31 Dec 2004	1	0.31	2.29	0.009	0.029
	1 Jan 2005	1	0.30	2.32	0.000	0.065
	3 Jan 2005	1	0.30	2.56	0.016	0.125
	4 Jan 2005	1	0.28	2.57	0.004	0.226
	Averages:		0.29	2.38
	Certified values:		0.28	2.39
	Standard deviation:		0.02	0.21
	Precision:		7.58%	8.67%
	Accuracy:		2.91%	–0.60%
BAS-140	26 Nov 2004	1	0.10	0.87	0.009	0.090
	3 Dec 2004	1	0.10	0.76	0.016	0.124
	4 Dec 2004	1	0.08	0.94	0.012	0.075
	11 Dec 2004	1	0.10	0.66	0.003	0.096
	12 Dec 2004	1	0.02	0.88	0.008	0.446
	14 Dec 2004	1	0.13	0.61	0.033	0.045
		2	0.10	0.84	0.006	0.021
	16 Dec 2004	1	0.08	0.72	0.018	0.047
	23 Dec 2004	1	0.10	0.87	0.006	0.090
	26 Dec 2004	1	0.09	0.71	0.000	0.150
	28 Dec 2004	1	0.09	0.98	0.009	0.124
	29 Dec 2004	1	0.09	0.93	0.014	0.012
	31 Dec 2004	1	0.11	0.78	0.017	0.060
	1 Jan 2005	1	0.10	0.83	0.006	0.083
	3 Jan 2005	1	0.09	0.75	0.003	0.079
	4 Jan 2005	1	0.08	0.91	0.006	0.000
	Averages:		0.09	0.81
	Certified values:		0.05	1.12
	Standard deviation:		0.02	0.11
	Precision:		23.58%	13.01%
	Accuracy:		45.28%	–37.46%