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Investigation of Matrix Effects for Some Pesticides in Waters by On-line Solid-Phase Extraction-Liquid Chromatography Coupled with Triple Quadrupole Linear Ion-Trap Mass Spectrometry and the Use of Postcolumn Introduction

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The effect of analytical conditions on on-line SPE-LC/MS/MS was investigated. Real matrix-induced signal suppression or enhancement due to the ionization process was simulated by using postcolumn introduction experiments. Results were compared with global matrix effects that occur during a routine analysis. Four pesticides were studied: carbendazim, fenuron, thiabendazole, and vamidothion. These compounds have different behaviors in terms of matrix effects. Good correlations were shown, demonstrating that the main matrix effect is due to the ionization step. Good results were also obtained for the RSD values (<5 for routine analysis and <35 for postcolumn introduction).
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Document Type: Research Article

Affiliations: 1: Institut Dpartemental d'Analyse et de Conseil, Route de Gchet, BP 52703, 44327 Nantes Cedex 3, France and Ecole Nationale Suprieure de Chimie de Rennes, CNRS, UMR 6226, Avenue du Gnral Leclerc, CS 50837, 35708 Rennes Cedex 7, France. 2: Institut Dpartemental d'Analyse et de Conseil, Route de Gchet, BP 52703, 44327 Nantes Cedex 3, France. 3: Ecole Nationale Suprieure de Chimie de Rennes, CNRS, UMR 6226, Avenue du Gnral Leclerc, CS 50837, 35708 Rennes Cedex 7, France and Universit Europenne de Bretagne, France.

Publication date: May 1, 2010

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  • The Journal of AOAC INTERNATIONAL publishes refereed papers and reviews in the fields of chemical, biological and toxicological analytical chemistry for the purpose of showcasing the most precise, accurate and sensitive methods for analysis of foods, food additives, supplements and contaminants, cosmetics, drugs, toxins, hazardous substances, pesticides, feeds, fertilizers and the environment available at that point in time. The scope of the Journal includes unpublished original research describing new analytical methods, techniques and applications; improved approaches to sampling, both in the field and the laboratory; better methods of preparing samples for analysis; collaborative studies substantiating the performance of a given method; statistical techniques for evaluating data. The Journal will also publish other articles of general interest to its audience, e.g., technical communications; cautionary notes; comments on techniques, apparatus, and reagents.
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