G - Physics – 01 – J
Patent
G - Physics
01
J
G01J 3/02 (2006.01) G01J 3/28 (2006.01) G01N 21/35 (2006.01)
Patent
CA 2050313
ABSTRACT OF THE DISCLOSURE The object of the invention is a method for the separation of overlapping absorption bands of a spectrum from one another, in which a part of the absorption bands of the gas being measured and of an interfering gas compound occur in the same wavelength area. The content of the gas being measured is obtained by means of the following stages: a pure spectrum of the interfering gas compound at the comparative content is entered into the memory; a pure wavelength area is chosen from the interfering gas compound spectrum, which does not overlap the spectrum of any other substance contained in the gas being investigated; the spectrum (SO) of the has mixture being investigated is measure and entered in the memory; the wavelength area of the above-mentioned pure area is determined from the measured spectrum, and the relative content value of the interfering gas compound in the gas being investigated is calculated by means of it; the spectrum of the interfering gas compound is calculated by means of the calculated content value, when the interfering spectrum contained in the measured spectrum is obtained; the measured spectrum is divided by the calculated interference spectrum, in which a corrected spectrum (S1) is obtained.
Linna Veli
Rantanen Jarmo
Marks & Clerk
Valtion Teknillinen Tutkimuskeskus
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