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Table T5. Standard reproducibility and accuracy and precision estimates for gas chromatography analyses of CO2 and H2O, Expedition 335.

Standard
Date
(2011)
CO2
(wt%)
H2O
(wt%)
JP-1 25 May 0.284 3.34
25 May 0.272 3.48
25 May 0.265 3.31
29 May 0.289 3.38
29 May 0.279 3.34
30 May 0.238 2.75
31 May 0.271 2.95
31 May 0.261 2.89
31 May 0.252 2.82
31 May 0.249 2.74
31 May 0.259 2.93
Average (wt%):
   0.265 3.09
Preferred value (wt%):
   0.280 2.39
Expedition 304:
   0.290 2.38
Standard deviation (wt%):
   0.016 0.28
Precision (%):
   6 9
Accuracy (%):
   –5 29
BAS-140 25 May 0.099 1.28
25 May 0.094 1.54
25 May 0.087 1.46
30 May 0.086 1.36
30 May 0.084 1.35
30 May 0.086 1.36
30 May 0.084 1.35
31 May 0.098 1.50
31 May 0.097 1.50
31 May 0.098 1.50
31 May 0.104 1.52
Average (wt%):
   0.092 1.43
Preferred value (wt%):
   0.050 1.12
Expedition 304:
   0.090 0.81
Standard deviation (wt%):
   0.007 0.09
Precision (%):
   8 6
Accuracy (%):
   85 28

Preferred values: JP-1 (Imai et al., 1995), BAS-140 (Sparks and Zuleger, 1995). Expedition 304: Expedition 304/305 Scientists (2006).

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