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A Method for Determining Helium in Water.

Authors
Holland-PW
Source
MISSING :17 pages
Link
NIOSHTIC No.
10006747
Abstract
The Bureau of Mines has developed a method for determining helium in water for use in sampling and analyzing surface and subsurface waters for geochemical survey work. The accuracy of the analytical method is within +/- 10 percent for samples containing above 20 x 10- 8 cm3 he (stp)/cm3 h20. The minimum detectable helium-in-water concentration is calculated to be 2 x 10-8 cm3 he (stp)/cm3 water. Water samples are collected in 500-cm3 stainless steel cylinders. The dissolved gases are extracted into a cylinder of equal volume containing a known quantity of neon. The resulting gas mixture is subsequently analyzed for helium and neon-21 by mass spectrometry. The volume of helium in the sample is calculated from the mass spectrometric determination of the helium-to-neon-21 ratio, the known quantity of neon used, and the extraction efficiency of helium.
Publication Date
19810101
Document Type
IH; Report of Investigation;
Fiscal Year
1981
NTIS Accession No.
NTIS Price
Identifying No.
RI 8578
NIOSH Division
HEFO;
Source Name
MISSING
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