Abstract
A small volume gas chromatograph (GC) oven and interface that permits repetitive separation and mass spectrometric analysis of effluents are described. Volatile products formed during the thermal analysis of solid samples are separated and identified by employing repetitive temperature program capillary GC with mass spectrometric (MS) detection. Thermal analysis effluent sampling intervals of a few minutes are achieved by using liquid nitrogen to cool the GC column between separations. A filtering algorithm that extracts MS information for selected species from multiple GC-MS chromatograms is also described. The algorithm simplifies the task of finding chromatographic peaks that correspond to the same eluent. After species-specific peaks are identified, they are integrated to create evolution temperature profiles that reflect changes in the effluent component concentrations.
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