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Determination of Six Organophosphorus Pesticides in Water by Single-Drop Microextraction Coupled with GC-NPD

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Abstract

A single-drop microextraction (SDME) procedure with a modified microsyringe was developed for the analysis of six organophosphorus pesticides (OPPs) in water. Microsyringe was modified by attaching a 2-mm cone onto the needle tip end. The conditions affecting SDME performance including microextraction solvent, stirring speed, extraction time, ionic strength and sample pH were optimized. Under the optimized conditions, the linear ranges of the SDME with ethion as internal standard were 0.05–50 μg L−1 (except for dimethoate 5–5,000 μg L−1) and limits of detection (LOD) were 0.012–0.020 μg L−1 (except for dimethoate 0.45 μg L−1). Recoveries of six pesticides were in the range of 70.6–107.5 % with relative standard deviation lower than 6.0 %. The modified method is simple, rapid and sensitive, and acceptable in the analysis of OPPs pesticides in water samples.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Nos. 41176104, U1133003). We thank other laboratory colleagues for help during the work.

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Authors and Affiliations

  1. Research Center of Hydrobiology, Jinan University, Guangzhou, 510632, China

    Fei Tian, Weijie Liu & Shunshan Duan

  2. State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China

    Hansun Fang

  3. Environmental and Analytical Laboratories, Faculty of Science, Graham Centre for Agricultural Innovation (An Alliance Between Charles Sturt University and NSW Department of Primary Industries), Charles Sturt University, Wagga Wagga, NSW, 2678, Australia

    Min An

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  1. Fei Tian
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  2. Weijie Liu
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  3. Hansun Fang
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  4. Min An
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  5. Shunshan Duan
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Correspondence to Fei Tian or Shunshan Duan.

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Tian, F., Liu, W., Fang, H. et al. Determination of Six Organophosphorus Pesticides in Water by Single-Drop Microextraction Coupled with GC-NPD. Chromatographia 77, 487–492 (2014). https://doi.org/10.1007/s10337-013-2609-1

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  • DOI: https://doi.org/10.1007/s10337-013-2609-1

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