IR QUANTITATIVE-ANALYSIS OF ORGANIC MIXTURES WITHOUT ANY CALIBRATION

A method of approximate quantitative IR spectral analysis of organic c ompounds without the use of standard materials was tested as applied t o artificial mixtures containing three and four components. The method ology of a non-calibration method of additive mixture analysis is sugg ested, which includes the calculation of absolute intensities of infra red absorption bands of components and measurement of an integral abso rbance on spectral intervals. It was shown that at least in the case o f a ternary mixture the computed concentrations can be used for an app roximate estimation of the mixture quantitative composition. (C) 1997 Elsevier Science B.V.