Abstract
Advances in computer technology as well as analytical instrumentation have made practical analytical systems combining various separation methods and multiple spectrometric detectors. Systems consisting of a separation device and a detector, such as gas chromatography-mass spectrometry (GC-MS), are already widely used. Newer methods employing two or more detectors in addition to a separation device are exemplified by gas chromatography-Fourier transform infrared spectroscopy-mass spectrometry (GC-FTIR-MS). A GC-FTIR-MS system has been used in different configurations for the analysis of two relatively complex mixtures of about 30 compounds. Complementary information obtained with such a multi-instrument system shows that it is a potentially powerful tool for complex mixture analysis.

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