公开(公告)号：AU2008242467B2

公开(公告)日：2011-09-29

申请号：AU2008242467

申请日：2008-01-24

Applicant: SPECTRASENSORS INC

Inventor： ALFRED FEITISCH ,  SANGER GREGORY M ,  XIANG LIU ,  XIN ZHOU

IPC: G01N21/31 ,  G01N21/35 ,  G01N21/39

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 (302) 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 (304) and thereby compensate for this background absorption to more accurately calculate the target analyte concentration in real or near real time (306). Additional background analytes can optionally be compensated for by using one or more additional reference wavelengths.