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RISS 인기검색어
- 검색키워드
- 저자 : 임채욱 ( Chaeuk Lim ) (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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GC-MS/MS를 이용한 Bifenazate diazene의 잔류농약 분석법 개발
김효영 ( Hyoyoung Kim ),임채욱 ( Chaeuk Lim ),이가연 ( Ka-yeon Lee ),홍수민 ( Sumin Hong ),조현정 ( Hyunjeong Cho ),김동호 ( Dong-ho Kim ),오상균 ( Sang-guen Oh ) 한국환경농학회 2018 한국환경농학회 학술대회집 Vol.2018 No.-
We developed the method for Bifenazate diazene for vitalization of export of domestic agricultural products. Korea’s major exporting countries are U.S.A, Japan, Hongkong and so on. These countries enforce Positive list system or Zero tolerance as one of technical barriers in trade. Residue definition of Bifenazate in Korea is the only bifenazate. But residue definition for bifenazate in several countries is bifenazate as the sum of bifenazate and its metabolite, bifenazate diazine. So this should be taken into account when analyzed. Our multiresidue method has been using mass spectrometry, and bifenazate was analyzed by the multiresidue method with GC-MS/MS in our previous study. To efficiently analyze bifenazate and its metabolite at once, we used the multiresidue method with GC-MS/MS. In the step of QuEChERS extraction added an analytes protectant(AP), Bifenazate diazine is converted to bifenazate. A method for Bifenazate diazine has been developed using the QuEChERS EN method with gas chromatography-tandem mass spectrometry (GC-MS/MS) in 5 agricultural commodities (Apple, Paprika. Pear, Strawberry, and Tomato). To validate the method developed, all commodities were spiked with two concentration levels of 10 and 100 μg/kg. The recoveries were within 70~120% with the relative standard deviation (RSD) of 10%, and the limit of quantification (LOQ) of methods was below 10 μg/kg, and the correlation coefficients (R2) of matrix-matched standards were > 0.99. The recoveries, LOQ, and repeatability achieved, meet the criteria of tolerance level monitoring of these pesticides in the agricultural export product.
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신선농산물 중 LC-MS/MS를 이용한 Azocyclotin 및 Cyhexatin의 잔류농약 분석법
김효영 ( Hyoyoung Kim ),임채욱 ( Chaeuk Lim ),박희정 ( Heejeong Park ),김민주 ( Minju Kim ),조현정 ( Hyunjeong Cho ) 한국환경농학회 2019 한국환경농학회 학술대회집 Vol.2019 No.-
Azocyclotin and cyhexatin are widely used to control of mites on fruits and vegetables. Each Country has a different residue definition of pesticide. Regulatory authorities need to choose which residue(s) will be used for dietary risk assessment and setting and enforcing MRLs. In most countries, including Korea, U.S.A and Japan, have a residue definition of these compounds is established for the sum of residues of azocyclotin and cyhexatin calculated as cyhexatin. We developed the method for these compound to vitalization of our agricultural products export. Korea’s major exporting countries are U.S.A, Japan, Hongkong and so on. These countries enforce Positive list system or Zero tolerance by technical barriers to trade. To safely export, the quantitative limit of the method must meet the 10 μg/kg level. A method for azocyclotin and cyhexatin has been developed using the modified-QuEChERS method with liquid chromatography-tandem mass spectrometry (LC-MS/MS) in 5 agricultural commodities (Apple, Paprika. Pear, Strawberry, and Tomato). To validate developed method, all commodities spiked with two concentration levels of 10 and 100 μg/kg. The recoveries were within 70 ~ 120% with the relative standard deviation (RSD) of 20% and the limit of quantification (LOQ) of methods were below 10 μg/kg, and the correlation coefficient (R<sup>2</sup>) of matrix-matched standards were > 0.99. The recoveries, LOQ, and repeatability achieved, meet the needs of tolerance level monitoring of these pesticides in the agricultural export product.
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