Large-Volume Direct Injection for Determining Naphthalene Derivative Pesticides in Water Using a Restricted-Access Medium Column in RPLC-LC with Fluorescence Detection
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- 作者：M. Mart¨ªnez Galera ; P. Parrilla V¨¢zquez ; J. L. Mart¨ªnez Vidal ; J. Mart¨ªnez Fern¨¢ndez and J. L. Pascual G¨®mez
- 关键词：Column liquid chromatography ; Coupled columns ; Large volume injection ; Naphthalene derivative pesticides ; Ground water analysis
- 刊名：Chromatographia
- 出版年：2004
- 出版时间：November 2004
- 年：2004
- 卷：60
- 期：9-10
- 页码：517-522
- 全文大小：346 KB
文摘
A simple multidimensional system for direct injection of large volumes has been developed for the determination of three naphthalene-derivative pesticides [2-(1-naphthyl) acetamide (NAD), 1-naphthyl methylcarbamate (carbaryl) and 1-naphthol] in water using fluorescence detection. The capability of restricted-access medium (RAM), pre-columns for eliminating large interfering molecules, combined with an optimised, coupled-column separation procedure, large volume injection (LVI) and fluorescence detection, gave excellent sensitivity for target analytes. The maximum admissible concentration levels established by the European Union (EU) for individual pesticides and their related compounds in drinking water (0.1 g L–1) were easily reached. Detection limits were lower than, or equal to, 0.003 g L–1. Average recoveries ranged: 81–104 % (n=3) with relative standard deviation (RSD) values: 2–7 % . Application of the coupled-column liquid chromatography (LC-LC) method was by determining target analytes in ground water samples from five agricultural zones of Almería, (Spain) over three months.