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:
Sep. 02, 2008
Filed:
Aug. 20, 2002
Nile Nelson Frawley, Midland, MI (US);
Jeffrey Robert Larson, Midland, MI (US);
Mark William Beach, Midland, MI (US);
Mark Lindsay Dittenhafer, Midland, MI (US);
Steven Randall Erskine, Lake Jackson, TX (US);
Joseph J. Kiefer, Auburn, MI (US);
Nile Nelson Frawley, Midland, MI (US);
Jeffrey Robert Larson, Midland, MI (US);
Mark William Beach, Midland, MI (US);
Mark Lindsay Dittenhafer, Midland, MI (US);
Steven Randall Erskine, Lake Jackson, TX (US);
Joseph J. Kiefer, Auburn, MI (US);
Dow Global Technologies, Inc., Midland, MI (US);
Abstract
A method for calibrating an analysis instrument, e.g., a gas chromatograph, for water analysis that includes four steps. The first step is to continuously remove water from a liquid that contains water to produce a liquid containing a reduced amount of water such as by membrane pervaporation. The second step is to analyze the liquid containing a reduced amount of water for water by a reference water analysis method such as by Karl Fischer titration. The third step is to analyze the stream of liquid containing a reduced amount of water using the instrument to be calibrated, e.g., a gas chromatograph having a helium photoionization pulse discharge detector. The fourth step is to calibrate the instrument using the analysis of the second step. In a related embodiment, a system for normal phase chromatography.