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Development and validation of analytical methods for pyrifluquinazon residues determination on agricultural commodities by HPLC-UVD
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2013, v.26 no.3, pp.174-181
https://doi.org/10.5806/AST.2013.26.3.174
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(2013). Development and validation of analytical methods for pyrifluquinazon residues determination on agricultural commodities by HPLC-UVD. Analytical Science and Technology, 26(3), 174-181, https://doi.org/10.5806/AST.2013.26.3.174
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Abstract
Pyrifluquinazon is classified with a quinazoline insecticide that regulates food intake by controling the feeding behavior acting on the endocrine or nervous system of pests such as aphids and white fly. To keep safety on pyrifluquinazon residues in agricultural commodities a simple, accurate and rapid analytical method was developed and validated using high performance liquid chromatograph (HPLC-UVD). The pyrifluquinazon residues acidified with 1% formic acid in samples were extracted with acetonitrile and partitioned with hexane subsequently to dichloromethane then purified with silica solid phase extraction (SPE) cartridge. The purified samples were detected using HPLC-UVD. The method was validated using apple and pear spiked with pyrifluquinazon at 0.02, 0.05 and 0.1 mg/kg and hulled rice, pepper, soybean at 0.05 and 0.1 mg/kg. Average recoveries were 70.5~107.9% with relative standard deviation less than 10%. The result of recoveries and overall coefficient of variation of a laboratory results in Gwangju regional FDA and Daejeon regional FDA was followed with Codex guideline (CODEX CAC/GL 40). This method is appropriated at pyrifluquinazon residues determination and will be used as official method of analysis.
- keywords
- pyrifluquinazon, HPLC-UVD, agricultural commodities, pesticide
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