Liner as the Key of Injection Optimization in Pesticide Analysis |
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Authors: | A Kende A Vrabecz V Angyal T Rikker Zs Eke K Torkos |
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Institution: | 1. Institute of Chemistry, E?tv?s University, Pázmány Péter sétány 1/A, 1117, Budapest, Hungary 2. Dr. E. We?ling Chemical Laboratory Ltd, 1047, Budapest, Fóti út 56, Hungary
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Abstract: | Regulations for pesticide residue analysis in food require very low detection limits; thus requiring maximum sensitivity in
the gas chromatographic determination. This is accomplished by an overall method optimisation, which includes optimisation
of injector parameters. Here we study the effect of the inlet liner design on the optimisation by comparing five liner designs
in splitless and pulsed splitless injection modes, using a test mixture of fifteen pesticides analyzed by GC-ECD. Possible
links between the injection parameters and liner types were evaluated, with the result that, accurate choice of inlet liner
and injection parameters can reduce detection limits by up to 300%.
Revised: 25 October 2005 and 9 January 2006 |
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Keywords: | Gas chromatography-electron capture detection Splitless and pulsed splitless injection Inlet liner design Pesticide analysis |
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