Determination of multiclass pesticide residues in apple juice by gas chromatography-mass selective detection after extraction by matrix solid-phase dispersion |
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Authors: | Hu Xiaozhong Jianxin Yu Zhigang Yan Lansun Ni Yanfei Lin Peng Wang Jing Li Xin Huang Xiaogang Chu Yibin Zhang |
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Affiliation: | Technology Center for Hubei Entry-Exit Inspection and Quarantine Bureau, Wansongyuan Rd, Wuhan, Hubei, China. huxz2002@sohu.com |
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Abstract: | A multiresidue method is described for the analysis of 106 multiclass pesticides (organochlorine, organophosphate, carbamate, pyrethroid, and triazine classes) in apple juice in a single injection. The determination procedure was based on matrix solid-phase dispersion of juice on diatomaceous earth in a glass column and subsequent extraction with a mixture of hexane-dichloromethane (1 + 1) at a flow rate of 5 mL/min. The analytes were determined by capillary gas chromatography with mass spectrometric detection and confirmed by their retention times and ion ratios. The coefficients of variation for analysis of samples fortified over the range of 0.01-0.2 mg/kg were 1.62 to 18.4%, and the recoveries for all analytes were between 70 and 110%. |
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