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Table T4. Standard reproducibility and accuracy and precision estimates for gas chromatography analyses of CO2, H2O and S, Expedition 345.
|
Standard
|
Date
|
CO2
(wt%)
|
H2O
(wt%)
|
S
(ppm)
|
|
JP-1
|
24 Dec 2012
|
0.28
|
2.50
|
ND
|
|
|
26 Dec 2012
|
0.33
|
2.48
|
ND
|
|
|
3 Jan 2013
|
0.35
|
3.02
|
ND
|
|
|
8 Jan 2013
|
ND
|
2.13
|
ND
|
|
|
12 Jan 2013
|
0.26
|
2.61
|
ND
|
|
|
13 Jan 2013
|
0.29
|
2.09
|
ND
|
|
|
17 Jan 2013
|
0.29
|
2.44
|
ND
|
|
|
28 Jan 2013
|
0.27
|
2.53
|
ND
|
|
|
3 Feb 2013
|
0.25
|
2.62
|
ND
|
|
|
8 Feb 2013
|
0.28
|
2.66
|
ND
|
|
Average (wt%/ppm):
|
0.289
|
2.507
|
ND
|
|
Preferred value (wt%/ppm):
|
0.280
|
2.540
|
|
|
Standard deviation (wt%):
|
0.030
|
0.26
|
ND
|
|
Precision (%):
|
11
|
11
|
ND
|
|
Accuracy (%):
|
3
|
–1
|
ND
|
|
MRG-1
|
24 Dec 2012
|
1.09
|
0.80
|
ND
|
|
|
26 Dec 2012
|
1.07
|
0.90
|
589
|
|
|
3 Jan 2013
|
1.19
|
1.16
|
ND
|
|
|
8 Jan 2013
|
ND
|
0.96
|
666
|
|
|
12 Jan 2013
|
1.04
|
0.89
|
521
|
|
|
13 Jan 2013
|
1.17
|
0.92
|
ND
|
|
|
17 Jan 2013
|
1.18
|
0.82
|
ND
|
|
|
28 Jan 2013
|
1.15
|
0.99
|
504
|
|
|
3 Feb 2013
|
1.10
|
0.96
|
ND
|
|
|
8 Feb 2013
|
1.15
|
0.94
|
ND
|
|
Average (wt%/ppm):
|
1.126
|
0.93
|
570
|
|
Preferred value (wt%/ppm):
|
1.070
|
1.02
|
605
|
|
Standard deviation (wt%):
|
0.053
|
0.099
|
74
|
|
Precision (%):
|
5
|
11
|
13
|
|
Accuracy (%):
|
5
|
–8
|
–6
|
ND = not determined.
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