Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1209, Issue 1-2, Pages 22-28Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2008.09.016
Keywords
GC-MS; Derivatization reaction; Optimization; Herbicides; Natural water samples
Funding
- Direccion General de Universidades e Investigacion
- Consejeria de Educacion and Comunidad de Madrid [S-0505/AGR-0314]
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The usefulness of the potassium tert-butoxide/dimethyl sulphoxide/ethyl iodide reaction with carbamate and phenylurea herbicides, and its application to phenoxy acids as a way to prevent hazards and toxicity of the sodium hydride/dimethyl sulphoxide/methyl iodide reaction was studied. Using factorial design optimization of this reaction was carried out. A solid-phase extraction method using dimethyl sulphoxide as eluent on-line with this reaction was developed to determine these herbicides in water samples by gas chromatography-mass spectrometry. Relative standard deviation values were lower than 10% for most of the herbicides in multicomponent trace determinations. Detection limits were in the 0.110-0.652 ng L-1 concentration range. The validity of the method was confirmed by recovery studies from natural water samples. (C) 2008 Elsevier B.V. All rights reserved.
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