Patent ID: 9618391
Date: 2017-04-11
CPC Classifications: G01J,G01N

Claim:
1. A method comprising: calculating a first concentration adjustment factor, the first concentration adjustment factor accounting for first differences between a first validation gas background condition of a first validation gas and a calibration gas background condition of a calibration gas used to prepare a stored reference spectrum, the first validation gas being representative of a first background concentration of at least one background component in a first sample gas, the first sample gas comprising an analyte compound at a first unknown concentration in addition to the at least one background component at approximately the first background concentration, the calculating of the first concentration adjustment factor comprising comparing first validation verification data with the stored reference spectrum, the first validation verification data quantifying a first intensity of light reaching a detector of a spectrometer from a light source of the spectrometer after the light passes through the first validation gas over a wavelength range of the light provided by the light source; modifying, using the first concentration adjustment factor, first sample measurement data collected with the spectrometer to compensate for collisional broadening of a spectral peak of the analyte compound in the first sample gas; calculating a second concentration adjustment factor, the second concentration adjustment factor accounting for second differences between a second validation gas background condition of a second validation gas and the calibration gas background condition, the second validation gas differing from the first validation gas and being representative of a second background concentration of the at least one background component in a second sample gas, the second sample gas comprising the analyte compound at a second unknown concentration in addition to the at least one background component at approximately the second background concentration, the calculating of the second concentration adjustment factor comprising comparing second validation verification data with the stored reference spectrum, the second validation verification data quantifying a second intensity of light reaching the detector of the spectrometer from the light source of the spectrometer after the light passes through the second validation gas over the wavelength range of the light provided by the light source; and modifying, using the second concentration adjustment factor, second sample measurement data collected with the spectrometer to compensate for collisional broadening of the spectral peak of the analyte compound in the second sample gas.