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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