The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 30, 1991
Filed:
Nov. 17, 1989
Johnathan H Batey, Kingsley, GB;
Donald S Richards, Middlewich, GB;
VG Instruments Group Limited, Crawley, GB;
Abstract
A mass spectrometer for the analysis of substances in a gas comprises means for generating a plasma in an enclosure through which a gas flows, conduit means for conveying the gas from the enclosure to a sampling member, and a mass analyzer for mass analyzing ions characteristic of the substances which pass through an aperture in the sampling member. The conduit means is constructed so that a line-of-sight path does not exist between the interior of the enclosure and the aperture in the sampling member. Substances for analysis may be introduced into the gas before or after it passes through the plasma enclosure. When the plasma comprises a pulsed DC glow discharge the spectrometer is useful for the analysis of traces of electrophillic substances in the gas.