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Mass Spectrometer Method for Determining Helium in the Parts-Per-Million to 10-Percent Range.

PB91225110

Publication Date	1991
Personal Author	Holland, P. W.
Page Count	15
Abstract	The U.S. Bureau of Mines has developed a mass spectrometer method for determining helium in the parts-per-million to 10-pct range to an accuracy of + or - 1 pct. The method employs a mass spectrometer, an inlet system utilizing a chromatographic gas-sampling valve, and an activated coconut charcoal trap cooled with liquid nitrogen. Gravimetrically prepared standards of helium in nitrogen were used to demonstrate the linearity of the method over the concentration range of 10 ppm to 10.66 pct helium.
Keywords	Helium 4 Mass spectroscopy Chemical analysis Helium isotopes Mass spectrometers Numerical analysis Standards
Source Agency	Bureau of Mines
NTIS Subject Category	99A - Analytical Chemistry 77B - Isotopes 97A - Reserves
Corporate Authors	Bureau of Mines, Amarillo, TX. Helium Field Operations.
Supplemental Notes	See also PB-252 474. Library of Congress catalog card no. 90-27339.
Document Type	Technical Report
Title Note	Rept. of investigations/1991.
NTIS Issue Number	199121

Mass Spectrometer Method for Determining Helium in the Parts-Per-Million to 10-Percent Range.

Mass Spectrometer Method for Determining Helium in the Parts-Per-Million to 10-Percent Range.
PB91225110

Publication Date	1991
Personal Author	Holland, P. W.
Page Count	15
Abstract	The U.S. Bureau of Mines has developed a mass spectrometer method for determining helium in the parts-per-million to 10-pct range to an accuracy of + or - 1 pct. The method employs a mass spectrometer, an inlet system utilizing a chromatographic gas-sampling valve, and an activated coconut charcoal trap cooled with liquid nitrogen. Gravimetrically prepared standards of helium in nitrogen were used to demonstrate the linearity of the method over the concentration range of 10 ppm to 10.66 pct helium.
Keywords	Helium 4 Mass spectroscopy Chemical analysis Helium isotopes Mass spectrometers Numerical analysis Standards
Source Agency	Bureau of Mines
NTIS Subject Category	99A - Analytical Chemistry 77B - Isotopes 97A - Reserves
Corporate Authors	Bureau of Mines, Amarillo, TX. Helium Field Operations.
Supplemental Notes	See also PB-252 474. Library of Congress catalog card no. 90-27339.
Document Type	Technical Report
Title Note	Rept. of investigations/1991.
NTIS Issue Number	199121