THE QUANTITATIVE-ANALYSIS OF MULTICOMPONENT GASEOUS-MIXTURES OF ORGANIC-COMPOUNDS BY FT-IR

Fourier transform infrared classical computation method applied to the direct quantitative analysis of multicomponent gaseous mixtures of th e organic compounds was described in the paper. For the analysis of mu lticomponent mixtures a number of important problems, such as select o f quantitative optimal peak windows and calibration of the spectral ba nd overlapping between the compounds, had been discussed. The FT-IR so ftware for multicomponent simultaneous determination of up to 10 compo unds in a gaseous mixture had been completed. The software can provide two kinds of the linear and nonlinear fits for the calibrating concen trations of the interference components. The accuracy, precision and t ime of the analysis were satisfactory. The results indicate that the m ethod can be used for the simultaneous quantitative analysis of the mu lticomponent gaseous mixtures of the organic compounds even if there a re serious overlaps of the infrared spectral absorption bands of the c ompounds.