CONDITION INDEX EVOLVING PROFILE LIBRARY SEARCHES - GAS-CHROMATOGRAPHY FOURIER-TRANSFORM INFRARED SPECTROMETRY APPLICATION

A procedure for library searching gas chromatography-Fourier transform infrared spectra is presented. Complete chromatographic resolution is not necessary for correct identification of components present. Simultaneously, spectral similarities create no obstacles for accurate detection. The procedure is based on condition index evolving profiles. Condition index evolving profiles result from performing singular value decomposition of library spectra with sample spectra as they evolve over time. The procedure is demonstrated to successfully identify components present in two-, three-, and four-component samples.