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Multi dimensional chromatography using on line coupled microcolumn liquid chromatography capillary gas chromatography for quantitative pesticide residue analysis



Multi dimensional chromatography using on line coupled microcolumn liquid chromatography capillary gas chromatography for quantitative pesticide residue analysis



Analytica Chimica Acta 236(1): 173-182



Highly selective separations can be achieved by utilizing different separation modes in a multi-dimensional (on-line coupled) chromatographic system. The application of such a system utilizing microcolumn liquid chromatography coupled on-line to capillary gas chromatography for the determination of 2-(1,1-dimethylethyl)-5-pyrimidinol, a pesticide metabolite, in various corn matrices at the ng g-1 level is described. A comparative quantitative study with conventional manual sample pretreatments followed by capillary gas chromatography-mass spectrometry indicated equivalence between the two techniques. The system offers the advantages of reduced sample handling steps and analysis time, high potential for automation and adequate sensitivity.

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Accession: 007574347

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