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. 17, 1990
Filed:
Jul. 07, 1988
Applicant:
Inventor:
David S Jones, Sale, GB;
Assignee:
VG Instruments Group Limited, Crawley, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
250288 ; 250282 ; 2504 / ;
Abstract
The invention provides a mass spectrometer for the analysis of a sample dissolved in a super-critical fluid. The fluid is expanded directly into an ionization chamber without a liquid-gas transition and the sample is ionized by means of a glow discharge established in the chamber. Preferably the electrodes between which the discharge is struck comprise the wall of the ionization chamber and the tube through which the super-critical fluid enters the chamber. The spectrometer is primarily intended for use with a super-critical fluid chromatograph.