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:
Mar. 14, 2000
Filed:
Oct. 17, 1997
Jerry T Dowell, Portola Valley, CA (US);
Jeffery S Hollis, San Jose, CA (US);
Charles W Russ, IV, Sunnyvale, CA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A mass spectrometer having an ionization source containing a chemical ionization chamber, wherein the inner surfaces of the chamber are formed from molybdenum to reduce adsorption, degradation and decomposition of an analyte and to reduce adverse ion/surface reactions is disclosed. A method of reducing adsorption, degradation and decomposition of an analyte and reducing adverse ion/surface reactions in an ionization source containing a chemical ionization chamber of a mass spectrometer including the step of forming the inner surfaces of the chamber from molybdenum is also disclosed. The inner surfaces may formed from molybdenum by constructing the entire chamber or the inner surfaces of the chamber from molybdenum; by depositing, plating or coating molybdenum on the inner surfaces of the chamber; or by a combination thereof. Suitable forms of molybdenum include solid molybdenum, mixtures containing at least 10% by weight molybdenum, and reaction products containing molybdenum.