Determination of metoxuron and 3-chloro-4-methoxyaniline via direct derivatization with heptafluorobutyric anhydride and GC-ECD |
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| Authors: | P de Voogt N Haak RB Geerdink UATh Brinkman |
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| Institution: | 1. Institute of Environmental Studies, Free University, P.O. Box 7161, 1007 MC Amsterdam The Netherlands;2. Section of Environmental Chemistry, Dept. of Analytical Chemistry, Free University, de Boelelaan 1083, 1081 HV Amsterdam, The Netherlands |
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| Abstract: | The phenylurea herbicide metoxuron and its main metabolite, 3-chloro-4-methoxyaniline, can be determined rapidly in aqueous samples via extraction, derivatization with heptafluorobutyric anhydride (HFBA), washing with an aqueous bufferof pH 8, and analysis by capillary GC with electron capture detection. Linear calibration curves are obtained over two orders of magnitude, and the detection limit for the HFB derivatives is about 0.5 pg. The method has successfully been applied to several types of water samples. |
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