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Published:Journal of Chromatographic Science,
ISSN 0021-9665Volume
40, Number 8, September 2002, pp. 434-440
Practical Fast Gas Chromatography for Contract Laboratory Program
Pesticide Analyses*
L. Wool and D. Decker
EPA, 10625 Fallstone Road, Houston, TX 77099
An approach to shortening the analysis time for practical fast
gas chromatography (GC) by using Method Translator software, which can be downloaded
free from the Internet, is presented. This software simplifies the process of
optimizing temperature programming while changing column dimensions, carrier
gas type, and flow. Basic chromatographic theory is employed in a practical
manner for adjusting column dimensions for optimal performance. In addition,
electronic pneumatic control and high oven ramp rates make it easier to achieve
fast analysis times without reproducibility problems. This practical approach
is demonstrated using Contract Laboratory Program pesticide analytes. The factors
found to be most important in decreasing the analysis time without a loss of
performance are utilization of GC columns having smaller diameters and substitution
of hydrogen for helium as the carrier gas.
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