Practical deviations from Henry`s law for water/air partitioning of volatile organic compounds
- Western Research Institute, Laramie, WY (United States)
A study was conducted to define parameters relating to the use of a down hole submersible photoionization detector (PID) probe to measure volatile organic compounds (VOCs) in an artificial headspace. The partitioning of toluene and trichloroethylene between water and air was studied as a function of analyte concentration and water temperature. The Henry`s law constant governing this partitioning represents an ideal condition at infinite dilution for a particular temperature. The results show that in practice. this partitioning is far from ideal. Conditions resulting in apparent, practical deviations from Henry`s law include temperature and VOC concentration. Thus, a single value of Henry`s law constant for a particular VOC such as toluene can provide only an approximation of concentration in the field. Detector response in saturated humidity environments as a function of water temperature and analyte concentration was studied also.
- DOE Contract Number:
- FC21-93MC30127
- OSTI ID:
- 613779
- Report Number(s):
- CONF-970113-; TRN: 98:001739-0029
- Resource Relation:
- Conference: Field analytical methods for hazardous wastes and toxic chemicals conference, Las Vegas, NV (United States), 29-31 Jan 1997; Other Information: PBD: 1997; Related Information: Is Part Of Field analytical methods for hazardous wastes and toxic chemicals; PB: 909 p.
- Country of Publication:
- United States
- Language:
- English
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