Radiant energy – Ionic separation or analysis – Methods
Patent
1992-03-25
1994-04-19
Berman, Jack I.
Radiant energy
Ionic separation or analysis
Methods
250281, 250288, B01D 5944
Patent
active
053047966
ABSTRACT:
The present invention provides a method of analyzing a gas sample for trace impurity concentration by atmospheric pressure ionization mass spectroscopy. In accordance with the present invention, moisture is removed from the gas sample before analysis by passing the gas sample through a dried bed of silica gel. The bed of silica gel is sufficiently dried so that remaining moisture present in the gas sample after passage through the bed is at a sufficiently low concentration such that the trace impurity concentration as analyzed by atmospheric ionization mass spectroscopy will not be effected by the remaining moisture.
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Siefering Kevin L.
Whitlock Walter H.
Berman Jack I.
Beyer James
Cassett Larry R.
Rosenblum David M.
The BOC Group Inc.
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