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  • 1 Anhui Agricultural University College of Resources and Environmental Sciences 230036 Hefei Anhui China
  • | 2 Anhui Key Laboratory of Agrifood Safety 230036 Hefei Anhui China
  • | 3 Key Laboratory of Tea Biochemistry and Biotechnology 230036 Hefei Anhui China
  • | 4 International Center for Bamboo and Rattan 100102 Beijing China
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A simple, rapid, and sensitive high-performance thin-layer chromatographic method has been developed and validated for analysis of residues of imidacloprid, fenitrothion, and parathion in Chinese cabbage. The sample was extracted by sonication in an ultrasonic water bath with acetone-petroleum ether, 5:3 ( v / v ), and the extract was directly applied, as bands, to glass-backed silica gel 60F 254 HPTLC plates. The plates were developed with hexane-acetone, 7 + 3 ( v / v ), in an unsaturated glass twin-trough Camag chamber. Evaluation of the developed HPTLC plates was performed densitometrically with a Camag TLC Scanner 3 controlled by an external PC running Wincats software (Version 1.1.2). The results indicated that the detection limits of imidacloprid ( RF = 0.10), fenitrothion ( RF = 0.59), and parathion ( RF = 0.70) were 5.0 × 10 −9 g, 2.0 × 10 −8 g, 1.0 × 10 −8 g, respectively. Recoveries of the pesticides from Chinese cabbage by use of this analytical method were 80.04–85.22%, and RSD were 4.18–13.15%. The precision and accuracy of the method were generally fit for analysis of pesticide residues in Chinese cabbage.

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