Absolute determination method for trace quantities of enantiomer of glufosinate by γ-cyclodextrin modified capillary zone electrophoresis combined with solid-phase extraction and on-capillary concentration
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概要
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A highly sensitive and accurate determination method for trace quantities of enantiomers of glufosinate (D,L-GLUF), a phosphorus-containing amino acid-type herbicide, has been studied. The present method is based on the change in the mole ratio of the enantiomeric isomers after spiking of a known amount of an isomer (L-GLUF). The chiral separation and detection were made by γ-cyclodextrin modified capillary zone electrophoresis (γ-CD-CZE) with fluorescence detection. Solid-phase extraction of D,L-GLUF with titania was investigated as the pre-separation method to eliminate coexisting materials such as inorganic salts and organic compounds in river water. A separated D,L-GLUF was labeled with dansyl chloride and subjected to the on-capillary concentration using large-volume sample stacking (LVSS) before γ-CD-CZE. The detection limit of the present method was as low as 2.0 × 10 -9 M. The present method was successfully applied to a model sample containing 2.0 × 10-7 M D,L-GLUF in river water. It was confirmed that trace quantities of D-and L-GLUF in environmental samples can be accurately determined without any calibration curves and comparison standards. 2006 © The Japan Society for Analytical Chemistry.
- 日本分析化学会 = Japan Society for Analytical Chemistryの論文
- 2006-12-10
著者
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井村 久則
金沢大院自然
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Imura Hisanori
Department Of Environmental Sciences Faculty Of Science Ibaraki University
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Imura Hisanori
Department Of Chemistry Faculty Of Science Ibaraki University
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ASAMI Takayuki
Department of Environmental Sciences, Faculty of Science, Ibaraki University
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Asami Takayuki
Department Of Environmental Sciences Faculty Of Science Ibaraki University
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井村 久則
金沢大 大学院
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