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doi:10.2204/iodp.proc.329.204.2017
Appendix D
Method for calculating the amount of drill water contamination
The following equation implies that peak area = 10b (PFT mass injected)m:
drill water (L)/core material (g) =
[(PBC/10b)1/m]/(CDW× W × F1), |
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where
- PBC = blank corrected integrated peak area of PFT in injected sample (in arbitrary units),
- b = intercept derived from the calibration curve,
- m = slope derived from the calibration curve,
- CDW = PFT concentration in drilling fluid (in grams/liter),
- W = weight of sediment sample (in grams), and
- F1 = fraction of total headspace injected:
| F1= Vinj/[Vvial – (W/ρbulk)], |
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where
- Vinj = volume of sample injected (in liters),
- Vvial = volume of vial (in liters),
- ρbulk = sediment sample density (in grams/liter), and
- W = weight of sample (in grams).
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