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http://dx.doi.org/10.7585/kjps.2014.18.4.296

Multiresidue Analysis of 124 Pesticides in Soils with QuEChERS extraction and LC-MS/MS  

Gwon, Ji-Hyeong (Department of Agro-food Safety, National Academy of Agriculture Science, Rural Development Administration)
Kim, Taek-Kyum (Department of Agro-food Safety, National Academy of Agriculture Science, Rural Development Administration)
Seo, Eun-Kyung (Department of Agro-food Safety, National Academy of Agriculture Science, Rural Development Administration)
Hong, Su-Myeong (Department of Agro-food Safety, National Academy of Agriculture Science, Rural Development Administration)
Kwon, Hye-Yong (Department of Agro-food Safety, National Academy of Agriculture Science, Rural Development Administration)
Kyung, Ki-Sung (Chungbuk National University)
Kim, Jang-Eok (Kyungpook National University)
Cho, Nam-Jun (Department of Agro-food Safety, National Academy of Agriculture Science, Rural Development Administration)
Publication Information
The Korean Journal of Pesticide Science / v.18, no.4, 2014 , pp. 296-313 More about this Journal
Abstract
A QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) multiresidue method was developed for the simultaneous analysis of 124 pesticides in soil by LC-MS. The procedure involved liquid extraction of soil immersed with 0.2N $NH_4Cl$ by acetonitrile with 1% acetic acid, followed by anhydrous $MgSO_4$ and sodium acetate, and dispersive SPE cleanup with $MgSO_4$, primary secondary amine (PSA) and $C_{18}$. The extracts were analyzed with LC-MS/MS in ESI positive mode. Standard calibration curves were made by matrix matched standards and their correlation coefficients were higher than 0.99. Recovery studies for the validation were carried out using two type soils, loam and sandy loam, at four concentration levels (0.005, 0.01, 0.02, and 0.1 mg/kg). The recoveries of pesticides were in the range of 70-120% with < 20% RSD except 4 pesticides, Benfuracarb, Ethiofencarb, Pymetrozine, and Pyrethrin. This result indicated that the method using QuEChERS and LC-MS/MS could be applied for the simultaneous determination of pesticide residues in soils.
Keywords
QuEChERS; Soil; Multiresidues analysis;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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