Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 959, Issue 1-2, Pages 309-315Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0021-9673(02)00453-3
Keywords
indirect detection; detection; electrophoresis; glyphosate; glufosinate; aminomethylphosphonic acid; phosphoric acids; pesticides; organophosphorus compounds
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A capillary electrophoresis (CE)-indirect fluorescence detection method is described for the simultaneous determination of glufosinate, glyphosate and aminomethylphosphonic acid. The three analytes were separated by CE in 5 min with a 1 mM fluorescein solution at pH 9.5. Fluorescein also functioned as a background fluorophore for the indirect detection of these nonfluorescent species. Linearity of more than two orders of magnitudes was generally obtained. The concentration limits of detection were in the muM range. Precisions of migration times and peak areas were less than 1.7% and 7.4%, respectively. Quantitation of glyphosate and glufosinate in commercial herbicides is demonstrated. In addition, the applicability of the method for the analysis of ground water was examined. (C) 2002 Elsevier Science B.V. All rights reserved.
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