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Title: Mass spectrometer vacuum housing and pumping system

A vacuum housing and pumping system is described for a portable gas chromatograph/mass spectrometer (GC/MS). The vacuum housing section of the system has minimum weight for portability while designed and constructed to utilize metal gasket sealed stainless steel to be compatible with high vacuum operation. The vacuum pumping section of the system consists of a sorption (getter) pump to remove atmospheric leakage and outgassing contaminants as well as the gas chromatograph carrier gas (hydrogen) and an ion pump to remove the argon from atmospheric leaks. The overall GC/MS system has broad application to contaminants, hazardous materials, illegal drugs, pollution monitoring, etc., as well as for use by chemical weapon treaty verification teams, due to the light weight and portability thereof. 7 figs.
Inventors:
; ;
Issue Date:
OSTI Identifier:
264553
Assignee:
Univ. of California, Oakland, CA (United States) PTO; SCA: 400102; 450600; PA: EDB-96:121599; SN: 96001625905
Patent Number(s):
US 5,539,204/A/
Application Number:
PAN: 8-386,781
Contract Number:
W-7405-ENG-48
Resource Relation:
Other Information: PBD: 23 Jul 1996
Research Org:
University of California
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; 45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; MASS SPECTROMETERS; VACUUM SYSTEMS; VACUUM PUMPS; DESIGN; EXTRACTION COLUMNS; POLLUTANTS; DETECTION; CHEMICAL WARFARE AGENTS; DRUGS; GAS CHROMATOGRAPHY; PORTABLE EQUIPMENT; GETTERING; USES