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Development and validation of an analytical method for nematicide imicyafos determination in agricultural products by HPLC-UVD
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2014, v.27 no.5, pp.234-242
https://doi.org/10.5806/AST.2014.27.5.234
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(2014). Development and validation of an analytical method for nematicide imicyafos determination in agricultural products by HPLC-UVD. Analytical Science and Technology, 27(5), 234-242, https://doi.org/10.5806/AST.2014.27.5.234
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Abstract
Imicyafos which is a nematicide for controlling root-knot nematodes has been registered in theRepublic of Korea in 2012, and the maximum residue limits of imicyafos are set to watermelon and koreanmelon as each 0.05 mg/kg. Extremely reliable and sensitive analytical method is required for ensuring foodsafety on imicyafos residues in agricultural commodities. Imicyafos residues in samples were extracted withacetone, partitioned with hexane and dichloromethane, and then purified with florisil. The purified samples wereanalyzed by HPLC-UVD and confirmed with LC-MS. Linear range was between 0.1~5 mg/kg with thecorrelation coefficient (r2) 0.99997. Average recoveries of imicyafos ranged from 77.0 to 115.4% at the spikedlevels of 0.02 and 0.05 mg/kg with the relative standard deviations of 2.2~9.6%. Limit of detection andquantification were 0.005 and 0.02 mg/kg, respectively. An inter-laboratory study was conducted to validatethe determination method in depth, and the results were satisfactory. All of the validation results revealed thatthe developed analytical method in this study is relevant for imicyafos determination in agricultural commoditiesand will be used as an official analytical method.
- keywords
- imicyafos, nematicide, HPLC-UVD, LC-MS, official analytical method
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