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김지영 ( Ji Young Kim ),김효진 ( Hyojin Kim ),송지영 ( Ji Young Song ),강혜라 ( Hera Kang ),성누리 ( Nu Ri Sung ),도정아 ( Jung Ah Do ),정용현 ( Yong- Hyun Jung ),이강봉 ( Kang Bong Lee ),최윤주 ( Youn Ju Choi ) 한국환경농학회 2018 한국환경농학회 학술대회집 Vol.2018 No.-
Chlorpyralid belongs to picolinic acid herbicide family targeting broadleaf plant such as clover and thistles. The action of this chemical is reducing or prohibiting the germination of grass, broadleaf weeds, and seedlings. An analytical method for the determination of Chlorpyralid residue in agricultural commodities was developed by Ministry of Food and Drug Safety (MFDS). For the analytical method verification, five representative commodities were chosen; chilli pepper for vegetable group, hulled rice for grain group, mandarin orange for fruit group, potato for root vegetables group and soybean for legume group. Briefly, sample were extracted with 5% formic acid in acetonitrile and partitioned by citrate buffer. To remove the interferences, dispersive-SPE using C18 and alumina neutral was used before LC-MS/MS (Liquid Chromatography -Tandem Mass Spectrometry) analysis with C18 column. The linear standard calibration curve was confirmed (coefficient of determination with calibration range). Mean average accuracies were shown 71.2~104.3 %. The precision were also shown less than 9.9% for all five samples. Is sum, the proposed method for Chlorpyralid residue determination developted by MFDS can be suitable for CODEX guidelines CAC/GL 40) and useful as official method.
LC-MS/MS를 이용한 농산물 중 이미다졸리논계 농약의 시험법 개발
김지영 ( Ji Young Kim ),김효진 ( Hyochin Kim ),송지영 ( Ji Young Song ),한아름 ( A Reum Han ),성누리 ( Nu Ri Sung ),윤상순 ( Sang Soon Yoon ),정용현 ( Yong Hyun Jung ),오재호 ( Jae Ho Oh ),김종수 ( Jong Soo Kim ) 한국환경농학회 2019 한국환경농학회 학술대회집 Vol.2019 No.-
Imidazolinone herbicides (Imazapyr, Imazalil, Imazamox, Imazaquin, Imazapic, Imazamethabenzmethyl and Imazethapyr) control weeds by inhibiting the enzyme acetohydroxyacid synthase(AHAS), also known as acetolactate synthase (ALS). AHAS is critical enzyme for the biosynthesis of branched chain amino acids in plants. Currently, each individual analytical method for Imidazoline herbicides is used as Ministry Food and Drug Safety (MFDS) method. Thus it consumes lots of time and effort to determine residue of Imidazolinone group in food. A Single analytical method for the determination of Imidazolinone residue in foods was developed as Ministry of Food and Drug Safety (MFDS) method. Five agricultural commodities (mandarin, potato, soybean, brown rice, and chilli pepper) were used as group representative to verify. After extracting with 1% formic acid in acetonitrile, samples were partitioned by citrate buffer. To remove the interferences, dispersive-SPE using C18 and PSA was performed before LC-MS/MS (Liquid Chromatography -Tandem Mass Spectrometry). The liner standard calibration curve were confirmed (coefficient of determination with calibration range). Mean average accuracies were shown 72.0~116.6 %. The precision were also shown less than 11.6% for all five samples. Thus, this method is acceptable to CODEX guideline for residue analysis (CAC/GL 40). Is sum, the proposed method for Imidazolinone group residue determination can be suitable for CODEX guidelines and useful as government method.