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소면적 재배 농산물 중 Flupyradifurone 및 Oxathiapiprolin의 잔류허용기준 설정을 위한 잔류 분석법 확립
곽윤선 ( Yun-seon Kwak ),한석희 ( Seokhee Han ),송민호 ( Minho Song ),금영수 ( Young-soo Keum ) 한국환경농학회 2019 한국환경농학회 학술대회집 Vol.2019 No.-
농산물 잔류농약에 의한 건강 위해성과 관련하여 2019년 1월부터 Positive List System (PLS)제도를 도입하여 실시하고 있다. 해당 제도의 시행으로 상대적으로 등록 농약이 한정된 소규모 재배 농산물에 대한 합리적이지 않은 농약의 사용으로 부적합 판정을 받는 사례가 발생하여, 이와 같은 소면적 재배 농산물의 농약 잔류허용기준의 설정이 시급하다. 본 연구는 이와 같은 소면적 재배 농산물에 대한 그룹 잔류허용기준 설정을 최종 목적으로 하여 잔류소장, 수준 및 안전사용기준 확보와 관련된 연구이다. 그룹 대표농산물로 엇갈이배추, 시금치, 들깻잎, 미나리 및 쪽파를 그룹 대표 농산물로 선정하였으며, acetylcholine receptor 저해효과를 지닌 살충제 Flupyradifurone 및 난균강 진균성 병원균 살균제 Oxathiapiprolin에 대한 분석법을 개발하고, 작물별 잔류자료를 산출하고자 하였다. 분석법은 식품공전 중 해당 농약의 분석법을 기본으로 하되, 회수율, 분석방해성분 등의 문제점을 확인하고 LC-MS를 활용, 정량적 분석법의 개선을 시도하였으며, 본 화합물과 다수 대사체의 분석을 실시하고 있다. 개별 대표작물에 대하여 산출된 결과를 바탕으로 소면적 재배 농산물의 농약의 안전사용기준(안)및 농약 잔류허용기준설정고시(안)을 마련하고자 한다.
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GC-MS/MS를 이용한 축산물 중 알드린 및 헵타클로르의 동시분석방법
이종화 ( Jonghwa Lee ),안다이 ( Dai An ),곽윤선 ( Yun-seon Kwak ),박주현 ( Ju Hyeon Park ),오미현 ( Mi Hyun Oh ),서수경 ( Soo Kyung Suh ) 한국환경농학회 2022 한국환경농학회 학술대회집 Vol.2022 No.-
Aldrin and heptachlor are a member of so-called “classic organochlorine” pesticides which can be highly toxic to the ecosystem through bioaccumulation. Although the use of these pesticides has been banned, sustainable management of the risk by bioconcentration is required due to its persistent nature. Aldrin and heptachlor including their metabolites (or a pesticide itself for dieldrin) are typical non-polar pesticides and it can be challenging to analyze the residues in fatty matrices such as beef and bovine fat due to the non-polar chemical property. Here we describe the development and validation of an analytical method for the quantitation of the aldrin and heptachlor residues in livestock matrices. The determination method involves analysis using a GC-MS/MS and QuEChERS sample preparation. In particular, it was found that the isomeric heptachlor metabolites, heptachlor epoxide A and B, have specific MRM conditions that can increase the signal. The ratio of sample amount vs. extraction solvent volume and the effectiveness of freezing out during the sample preparation procedure were also tested. Results for beef and egg matrices were compliant with the validation guideline described in Food and Drug Safety Document. Also, the results demonstrate that the workflow based on GC-MS/MS with a high sample/extraction solvent ratio and freezing-out procedure can overcome the issues experienced with previous methods reported for the analysis of fat-soluble and non-polar pesticides.
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유기질 퇴비 시비에 따른 토양 중 polychlorinated biphenyls의 작물 흡수 이행
임다솜(Da-Som Lim),주소현(So-Hyun Joo),곽윤선(Yun-Seon Kwak),금영수(Young-Soo Keum) 한국농약과학회 2017 농약과학회지 Vol.21 No.4
BACKGROUND: Translocations of organic compounds from soil to crops are dependent on many physicochemical properties including soil organic compounds, mineralogy, climate, and plant species, among which the organic contents were one of the most important factors determining the transfer ratio of organic pollutants from agricultural soils to common crops. Bioaccumulation through translocation is an important process for the evaluation of crop safety cultivated in contaminated soils METHODS AND RESULTS: Several PCB derivatives were prepared by chemical syntheses and applied on upland soils with different application rates of organic fertilizer. Concentrations of PCBs in soil and carrot were analyzed with GC-MS. In general, the translocation ratio of PCBs from soil to carrot was inversely related to the organic contents. For example, the ratios of PCB-126 in low-, medium-, and high-organic content soils were 0.17, 0.12, and 0.08, respectively. In addition, tranlocation ratios were also inversely related to the hydrophobicities of contaminants. Lipophilic PCBs were gradually accumulated in carrots till the end of experimental periods, while accumulation of polar analogues reached a maximum at 40-60 days of cultivation. CONCLUSION: Translocation of organic pollutants were negatively correlated with the soil organic contents. Application of organic fertilizers inhibit the accumulation of PCBs on carrot, which were well coincided with literature results. Additionally, it was found that accumulations of lipophilic persistant contaminants including highly chlorinated PCB analogues were very slow.
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