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. 08, 2009
Filed:
Oct. 30, 2007
Xiang Liu, Phoenix, AZ (US);
Xin Zhou, Rancho Cucamonga, CA (US);
Alfred Feitisch, Los Gatos, CA (US);
Gregory M. Sanger, Chico, CA (US);
Xiang Liu, Phoenix, AZ (US);
Xin Zhou, Rancho Cucamonga, CA (US);
Alfred Feitisch, Los Gatos, CA (US);
Gregory M. Sanger, Chico, CA (US);
Spectrasensors, Inc., Rancho Cucamonga, CA (US);
Abstract
Concentrations of a target analyte in a gas mixture containing one or more background analytes having potentially interfering spectral absorption features can be calculated by compensating for background analyte absorption at a target wavelength used to quantify the target analyte. Absorption can be measured at a reference wavelength chosen to quantify the concentration of the background analyte. Using a background gas adjustment factor or function, the absorption measured at the reference wavelength can be used to calculate absorption due to the background analyte at the target wavelength and thereby compensate for this background absorption to more accurately calculate the target analyte concentration in real or near real time. Additional background analytes can optionally be compensated for by using one or more additional reference wavelengths.