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http://dx.doi.org/10.7585/kjps.2013.17.1.65

Evaluation of QuEChERS Method for Determination of pesticide Residues Using GC/NPD and GC/ECD  

Cho, Tae Hee (Kangnam Agro-Fishery Products Inspection Center, Seoul Metropolitan Goverment Research Institute of Public Health and Environment)
Park, Young Hye (Kangnam Agro-Fishery Products Inspection Center, Seoul Metropolitan Goverment Research Institute of Public Health and Environment)
Park, Hye Won (Kangnam Agro-Fishery Products Inspection Center, Seoul Metropolitan Goverment Research Institute of Public Health and Environment)
Hwang, Lae Hwong (Kangnam Agro-Fishery Products Inspection Center, Seoul Metropolitan Goverment Research Institute of Public Health and Environment)
Cho, In Soon (Kangnam Agro-Fishery Products Inspection Center, Seoul Metropolitan Goverment Research Institute of Public Health and Environment)
Kim, Min Jung (Kangnam Agro-Fishery Products Inspection Center, Seoul Metropolitan Goverment Research Institute of Public Health and Environment)
Kim, Hyun Jeong (Kangnam Agro-Fishery Products Inspection Center, Seoul Metropolitan Goverment Research Institute of Public Health and Environment)
Kim, Mu Sang (Kangnam Agro-Fishery Products Inspection Center, Seoul Metropolitan Goverment Research Institute of Public Health and Environment)
Chae, Young Zoo (Kangnam Agro-Fishery Products Inspection Center, Seoul Metropolitan Goverment Research Institute of Public Health and Environment)
Publication Information
The Korean Journal of Pesticide Science / v.17, no.1, 2013 , pp. 65-71 More about this Journal
Abstract
The modified QuEChERS method was evaluated for rapid determination of pesticide residues in spinach by gas chromatography-nitrogen phosphorous detector (NPD) and electron capture detector (ECD). Fifty GC-amenable pesticides which were most frequently detected in monitoring were selected in the current study. Matrix-matched calibration was performed. The detector response for all pesticides was linear with determination coefficients higher than 0.995. LODs for most compounds ranged between 0.001 and 0.1 ug/g, and about 90% of the compounds had LODs of less than 0.05 ug/g. LOQs ranged from 0.001 to 0.32 ug/g, which were well below the MRLs permitted for most of pesticides. In the majority of cases, the recoveries (80-120%) and relative standard deviations (RSDs) (less than 20%) were within acceptable levels except for dichlorvos, propamocarb, chlorothalonil, dichlofluanid, cyhalothrin and fenvalerate. Also, this method which is applied to routine samples showed good results when comparing with traditional multi-residue method.
Keywords
GC-ECD; GC-NPD; Pesticide residues; QuEChERS;
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