Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1985-09-13
1989-01-24
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250255, G01J 100
Patent
active
048002798
ABSTRACT:
Methods are disclosed for quantifying physical properties of gaseous, liquid or solid samples. The near-infrared absorbance spectra of a representative field of calibration samples are measured and recorded using a spectrophotometer. The absorbance spectra of the calibration samples are evaluated by a row-reduction algorithm to determine which wavelengths in the near-infrared spectrum, and associated weighting constants, are statistically correlated to the physical property being quantified. The near-infrared absorbance of actual samples is then measured at each of the correlated wavelengths, and then corrected by the corresponding weighting constants. A reference value for the physical property being quantified is then computed from the corrected measure of the absorbance of the sample at each of the correlated wavelengths.
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Hieftje Gary M.
Hirschfeld Thomas B.
Honigs David E.
Howell Janice A.
Indiana University Foundation
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