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천궁 중 mandipropamid와 metalaxyl-M의 잔류특성 연구
정동규(Dong Kyu Jeong),정원민(Won Min Jeong),구영민(Young Min Goo),길영숙(Young Sook Kil),신승미(Seung Mi Sin),김상곤(Sang Gon Kim),김도형(Do Hyoung Kim),김영진(Yeong Jin Kim),권영상(Young Sang Kwon),김진효(Jin Hyo Kim),이희동(Hee Do 한국농약과학회 2020 농약과학회지 Vol.24 No.2
This study was conducted to investigate residual characteristics and to evaluate safety of mandipropamid and metalaxyl-M in minor crop used as herbal medicine Cnidium officinale Makino. The pesticides were sprayed three times with a dose of 200 L/10 a at 2,000 fold dilutions with different treatment dates before harvest. Harvested Cnidium officinale Makino were dried following custom processing. Pesticide treatment samples closest to the harvest date were analyzed for residues in fresh samples to calculate processing factors. The method limit of detection (MLOD) was 0.004 ㎎/㎏ for two pesticides in dried or fresh samples. Average recovery rates were 89.7-95.9% and 96.6-111.1% for mandipropamid and metalaxyl-M. Mandipropamid were detected in the range of 1.462-2.427 ㎎/㎏ and 0.515-0.542 ㎎/㎏ as dried and fresh sample, respectively. metalaxyl-M residues were shown range of 0.020-0.443 ㎎/㎏ and 0.097-0.141 ㎎/㎏ as dried and fresh sample, respectively. Residual concentration of mandipropamid and metalaxyl-M in the crop was increased as spraying more closer to harvest day. Also, The dried sample showed higher residual amount than the fresh sample in the same treatment. The processing factors of mandipropamid and metalaxyl-M were 4.36 and 3.52, respectively. The %ADIs of the two pesticides in the crop were less than 0.8%.
05 포스터 발표 : 환경 화학 분야(PC) ; HPLC를 이용한 유채 열매와 잎에서의 Thiamethoxam과 대사산물 Clothianidin의 동시 분석
정동규 ( Dong Kyu Jeong ),이동열 ( Dong Yeol Lee ),김상곤 ( Sang Gon Kim ),강규영 ( Kyu Young Kang ) 한국환경농학회 2014 한국환경농학회 학술대회집 Vol.2014 No.-
This study was carried out to investigate simultaneous analyses of thiamethoxam and itsmetabolite clothianidin in Brassica napus seed and leaf using HPLC/DAD. Thiamethoxam and its metabolites clothianidin were extracted by acetonitrile and clean-up with NH2 cartridge and analyzed with HPLC/DAD. The limits of detection and quantification were 0.01 and 0.03mg/kg at thiamethoxam and clothianidin in Brassica napus seed and leaf, respectively. The average recovery rates were 95.5 ± 1.92%, 81.0 ± 2.33% for thiamethoxam and 85.3 ± 4.30%, 100.8 ± 2.47% for clothianidin at fortification levels at 0.1 and 0.5 mg/kg in Brassica napus seed, respectively. And average recoveries were 93.8 ± 1.07%, 96.5 ± 1.02% for thiamethoxam and 99.7 ± 1.60%, 93.1 ± 0.94% for clothianidin at fortification levels at 0.1 and 0.5 mg/kg in Brassica napus leaf, respectively. The validated method was applied for the determination of thiamethoxam and its metabolite clothianidin in Brassica napus seed and leaf samples. This study indicated that the method using HPLC/DAD was suitable for the simultaneous analysis of thiamethoxam and its metabolite clothianidin in Brassica napus seed and leaf.
생산단계 잔류허용기준 설정을 위한 엇갈이배추 중 bistrifluron과 fluopicolide의 잔류 특성 연구
이동열(Dong Yeol Lee),정동규(Dong Kyu Jeong),최근형(Geun-Hyoung Choi),이득영(Deuk-Yeong Lee),강규영(Kyu Young Kang),김진효(Jin Hyo Kim) 한국농약과학회 2015 농약과학회지 Vol.19 No.4
This study investigated residual characteristics of bistrifluron and fluopicolide in Korean cabbage, and suggested the pre-harvest residue limits (PHRLs) based on their dissipation patterns and biological halflives. The pesticides were sprayed on Korean cabbage in two different region under greenhouse conditions at the recommended dose, respectively. The samples for residue analysis were harvested at 0 (2 hr), 1, 2, 4, 6, 8 and 10 days after treatment, and analyzed by HPLC after clean-up with Florisil SPE. The limit of quantification (LOQ) was 0.03 mg kg<SUP>−1</SUP> for bistrifluron and fluopicolide, and the recoveries ranged from 87.2-110.6% with below 5% of RSD. The biological half-lives of field I and field II were 3.9 and 4.2 days for bistrifluron and 4.9 and 4.2 days for fluopicolide, respectively. The PHRL of bistrifluron and fluopicolide were recommended as 3.83 and 3.23 mg kg<SUP>−1</SUP> for 10 days before harvest, respectively.
이동열 ( Dong Yeol Lee ),정동규 ( Dong Kyu Jeong ),정원민 ( Won Min Jeong ),구영민 ( Yong Min Goo ),김상곤 ( Sang Gon Kim ),허재영 ( Jae Young Heo ),이효섭 ( Hyo Sub Lee ) 한국환경농학회 2020 한국환경농학회 학술대회집 Vol.2020 No.-
농산물이 잔류농약으로 인한 안전성을 보장받기 위해서는 병해충 관리를 위해 직접 살포되는 농약 뿐만 아니라, 재배환경 중 직 · 간접적으로 영향을 미치는 잔류농약에 대한 관리가 이루어져야 한다. 농업용수에는 농약살포 중 비산, 살포 후 용탈 및 세탈 등에 의한 농약이 잔류할 수 있고 이러한 농약이 농작물에 흡수 · 이행되어 오염이 발생할 수 있다. 이에 본 연구는 경남지역 농업용 하천수 12지점에서 농약의 잔류양상을 조사하기 위해 2019년 4월, 7월, 10월 시료를 채취하여 acetamiprid 등 99종의 잔류농약을 모니터링하였다. 농업용수 시료의 분석은 dichloromethane을 이용하여 액-액분배 (Liquid-Liquid Extraction, LLE)법으로 전처리 한 후 LC-MS/MS로 기기분석하였다. 분석결과 4월에는 azoxystronin 등 9종, 7월에는 alarchlor 등 18종, 10월에는 chlomataniliprole 등 6종의 농약이 검출되었으며, 2019년 경남지역 농업용 하천수 12지점에서 다빈도로 검출된 농약은 quinoclamine, fluxapyroxad, azpxystrobin, chlorantraniliprole 순으로 나타났다.
05 포스터 발표 : PC-05 ; 홍고추 중 Chlorantraniliprole과 Flubendiamide의 생산단계 잔류허용기준 설정
이동열 ( Dong Yeol Lee ),정동규 ( Dong Kyu Jeong ),김영진 ( Yeong Jin Kim ),김상곤 ( Sang Gon Kim ),강규영 ( Kyu Young Kang ) 한국환경농학회 2014 한국환경농학회 학술대회집 Vol.2014 No.-
This study was carried out to investigate the residual characteristics of chlorantraniliprole and flubendiamide in red pepper, and establish pre-harvest residue limits (PHRL) based on dissipation and biological half-lives of pesticide residues. Two pesticides were sprayed onto the red pepper at recommended dosage and double dosage, respectively. The samples were harvested at 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12 and 15 days after treatment. These residual pesticides were extracted with QuEChERS method, clean-up with NH2 SPE cartridge, and residues were analyzed by HPLC/DAD. Method quantitative limits (MQL) of chlorantraniliprole was 0.06 mg/kg and flubendiamide was 0.012 mg/kg, respectively. Recovery rates were 86.7 ± 1.45%, 102.0 ± 4.98% for chlorantraniliprole at fortification levels at 0.6 and 3.0 mg/kg, and 97.5 ± 5.23%, 91.6 ± 1.32% for flubendiamide at fortification levels at 0.12 and 0.6 mg/kg, respectively. The biological half-lives of chlorantraniliprole and flubendiamide were 6.2 day and 17.8 day at recommended dosage. The PHRLs of chlorantraniliprole and flubendiamide were recommended as 2.43 and 1.33 mg/kg for 10 days before harvest using SPSS statics program.
이동열 ( Dong Yeol Lee ),정동규 ( Dong Kyu Jeong ),정원민 ( Won Min Jeong ),구영민 ( Yong Min Goo ),김상곤 ( Sang Gon Kim ),조현지 ( Hyeon Ji Cho ),이효섭 ( Hyo Sub Lee ) 한국환경농학회 2020 한국환경농학회 학술대회집 Vol.2020 No.-
작물 재배 중 병해충의 방제, 생산량 및 품질의 향상 등을 위해 사용되는 농약은 사용 후농업환경에 잔류되기도 한다. 토양 중에 잔류하는 농약은 작물에 흡수·이행되어 작물에 비의도적인 오염을 일으키는 원인이 될 수 있어, 농경지 중 농약 잔류소장을 파악하고 이를 통한 안전관리 방안이 필요한 실정이다. 이에 본 연구는 경상남도 내 논토양 65지점에서 농약의 잔류실태를 조사하기 위해 acephate 등 112종의 잔류농약을 모니터링하였다. 토양 시료의 분석은 건조토양을 습윤화하여 acetonitrile로 추출하고 QuEChERS법을 응용하여 전처리 한 후 LC-MS/MS로 기기분석하였다. 분석결과 112성분 농약 중 alachlor를 포함한 58성분의 농약이 검출되었으며, butachlor, tricyclazole, cyantraniliprole 등이 다빈도 검출 농약으로 조사되었다.
약초 추출물과 그 분획물의 식물병원균에 대한 항진균 활성
오경열(Kyeong-Yeol Oh),정동규(Dong-Kyu Jeong),송영훈(Yeong Hun Song),이득영(Deuk-Yeong Lee),이동열(Dong-Yeol Lee),최근형,김세리,김진효(Jin-Hyo Kim) 한국농약과학회 2021 농약과학회지 Vol.25 No.4
This study was to discover the plant organic agricultural materials that can be used for disease control crops targeting phytopathogenic fungi. The antifungal activities of the ethanol extracts of 84 medicinal herbs and their fractions were screened and the antimicrobial active compounds in the extract were surveyed. The antifungal activities of the extracts were tested with the paper-disc diffusion method against R. solani, P. capsici, S. sclerotiomm, F. oxysporum and C. acutatum at 5 0 0mg L<SUP>-1</SUP>. The ethanol extracts of Acorus gramineus, Artemisia annua, Panax ginseng, Rehmannia glutinosa, Citrus unshiu, Platycodon grandiflorum, Xanthium strumarium, Morus alba, Pinus densiflora, Zingiber officinale and Atractylodes japonica inhibited over the three target fungi including R. solani, and S. sclerotiorum among them. The 11 bioactive ethanol extracts were separated with hexane, ethyl acetate and water layers by liquid-liquid partition. The organic solvent fractions of A. gramineus, P. ginseng, R. glutinosa, C. unshiu, Z. officinale and A. japonica and the aqueous fractions of A. anmua, P. grandiflorum, X. strumarium and P. densiflora showed more potent antifungal activity than the other fraction as well as the increment of the activity at the concentration of 500 mg L<SUP>-1</SUP>.