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KMID : 0385520120250060364
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Analytical Science & Technology
2012 Volume.25 No. 6 p.364 ~ p.369
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Development of analytical method for Isotianil in agricultural commodities using GC-NPD and GC-MSD
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Do Jung-Ah
Lee Mi-Young
Kang Il-Hyun
Kwon Ki-Sung
Oh Jae-Ho
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Abstract
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Isotianil is a novel fungicide which induces systemic acquired resistance in plants. It has excellent preventive effects as low dosages against rice blast which is one of the most serious diseases in rice. The Maximum Residue Limit (MRL) of Isotianil in republic of korea was set to 0.1 mg/kg in rice, so it is necessary to determine levels of Isotianil residues in agricultural commodities for controlling food safety. Therefore, The purpose of this study was to develop analytical method for the determination of isotiical residues in agricultural commodities using GC-NPD/MSD. Isotianil was extracted with acetonitrile from apple, chinese cabbage, hulled rice, mandarin, pepper, and soybean. The extract was diluted with saline water, and then dichloromethane partition was followed to recover this fungcide from the aqueous phase. A solid phase extraction with Florisil cartridge was additionally employed for final clean up. Isotianil was analyzed and quantitated by GC-NPD and confirmed by GC-MSD. Average recovery of Isotianil ranged from 70.0 to 103.9% in six representative agricultural commodities with relative standard deviations less than 10%, and limit of quantification (LOQ) was 0.05 mg/kg.
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KEYWORD
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Isotianil, analytical method, pesticide, GC-NPD, GC-MSD
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