[Processing GC-FTIR by the blind source separation].

An analysis method for separating chromatographic overlapped peaks and purifying infrared spectra is put forward,based on the blind source separation technique and the multi-dimensional data of GC-FTIR,Using various information from(hyphenated) instruments,this method was used to separate completely a organic mixture,the xylene isomerism system,a problem unable to solve usually.The method can confirm the rationality of theory and algorithm and give integral explanations of the independent component analysis data.The reason for the error in quantitative analysis is discussed.