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Published:Journal of Chromatographic Science,
ISSN 0021-9665Volume
37, Number 7, July 1999, pp.263-268
Effluent Monitoring by Repetitive
Injection Gas Chromatography—Mass Spectrometry
Darrel L. Negelein, Edouard Bonnet, and Robert
L. White
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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