Automated determination of pyrethroid insecticides in surface water by column liquid chromatography with diode array UV detection, using on-line micelle-mediated sample preparation.

E.R. Brouwer, E.A. Struys, J.J. Vreuls, U.A.T. Brinkman

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

A liquid chromatographic method using gradient elution and diode array UV detection for the trace level determination of seven synthetic pyrethroids is described. The procedure involves automated on-line preconcentration on precolumns containing octadecylbonded silica using a Prospekt. Although the analytes display a "mixed" hydrophobic/hydrophilic behaviour, both breakthrough on the precolumn and adsorption to inner walls and surfaces can be prevented by adding Brij-35, a neutral surfactant, to the aqueous sample. The procedure has been tested for the analysis of surface water; detection limits typically are at the sub-μg/l level and repeatability is excellent. The automated system is robust and there are no maintenance problems. © 1994 Springer-Verlag.
Original languageEnglish
Pages (from-to)487
JournalFresenius' Journal of Analytical Chemistry
Volume350
DOIs
Publication statusPublished - 1994

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