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:
Nov. 20, 2001
Filed:
Nov. 12, 1998
Applicant:
Inventors:
Eldon L. Jeffers, LaPorte, TX (US);
Edward M. Ejzak, Webster, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 1/40 ;
U.S. Cl.
CPC ...
G01N 1/40 ;
Abstract
An apparatus is disclosed which is capable of detecting a selected gas in a liquid sample to a sensitivity in the range of 10 to 10,000 parts per trillion. Such sensitivity is achieved by concentrating the selected gas in a sample without concentrating sources of ionic interference that are also present in the sample. Selective concentration of the gas is achieved by vaporizing the sample, correcting for non-ideal vaporization, selectively condensing the selected gas from the vapor, and detecting the selected gas. Methods for using the apparatus and detecting the selected gas are also disclosed.