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국내 유통 농산물 중 과채류와 근채류의 잔류농약 모니터링 및 위해성 평가
안지운 ( Ji Woon Ahn ),전영환 ( Young Hwan Jeon ),황정인 ( Jeong In Hwang ),김효영 ( Hyo Young Kim ),김지환 ( Ji Hwan Kim ),정덕화 ( Duck Hwa Chung ),김장억 ( Jang Eok Kim ) 한국환경농학회 2012 한국환경농학회지 Vol.31 No.2
BACKGROUND: This study was conducted to monitor the residue of pesticides and to assess their risk in domestic agricultural products, such as fruit vegetables, tomatoes, oriental melons and root vegetables, garlic, potatoes and onions. METHODS AND RESULTS: 250 samples containing both general and environment-friendly certified agricultural products were collected from traditional markets and supermarkets in 6 cities. 132 pesticides except for herbicides were analysed using the multi-residue methods by GC/ECD, GC/NPD and HPLC/UVD. 17 kinds of pesticides were detected from 42 samples, which were 32 general, 1 organic, 4 pesticide-free and 5 low pesticide agricultural products. Among those, myclobutanil detected in 1 potato and procymidone detected in 10 oriental melons were unregistered pesticides for using in Korea, Fenbuconazole detected in 1 potato and phorate detected in 1 tomato were exceeded over the MRLs established by Korea Food and Drug Administration, CONCLUSION: Based on these results, a risk assesment was conducted using a percentage of acceptable daily intake (%ADI). %ADI ranged from 0.0064% to 4.6035%, and showed these values have no effect on human health.
안지운 ( Ji Woon Ahn ),전영환 ( Young Hwan Jeon ),황정인 ( Jeong In Hwang ),김정민 ( Jeong Min Kim ),석다롱 ( Da Rong Seok ),이은향 ( Eun Hyang Lee ),이성은 ( Seong Eun Lee ),정덕화 ( Duck Hwa Chung ),김장억 ( Jang Eok Kim ) 한국환경농학회 2013 한국환경농학회지 Vol.32 No.2
BACKGROUND: This study was conducted to monitor residual pesticides in domestic agricultural products and to assess their risk to human health. METHODS AND RESULTS: 123 samples containing both general and environment-friendly certified agricultural products were purchased from traditional domestic markets and supermarkets in six provinces of Korea. Multiresidue analyses of one hundred twenty-two pesticides except for herbicides were performed with gas chromatography-electron capture detector, gas chromatography-nitrogen/phosphorus detector, and high-performance liquid chromatography. Sixteen pesticides were detected in 45 agricultural product samples, which were 38 general, 6 low pesticide and 1 of GAP agricultural product samples and the detection rate was 33.6%. Pesticides detected in agricultural product samples were cypermethrin, lufenuron, fenvalerate, bifenthrin, chlorfenapyr and iprodione. Residual concentration of 18 samples were exceeded the recommended maximum residue limit set by Ministry of Food and Drug Safety and two kinds of unregistered pesticides in korea were also detected in two samples. CONCLUSION(S): In order to do risk assessment by agricultural products consumption, estimated daily intake of residual pesticides were determined and compared to acceptable daily intake, referring to %ADI values. The range of %ADI values was from 0.038% to 2.748%. Taken together, it demonstrates the pesticides found in agricultural products samples were below the safety margin, indicating no effect on human health.
Triazole계 살균제의 사과 중 잔류양상의 Kinetic Model 적용
김지환 ( Ji Hwan Kim ),황정인 ( Jeong In Hwang ),전영환 ( Young Hwan Jeon ),김효영 ( Hyo Young Kim ),안지운 ( Ji Woon Ahn ),김장억 ( Jang Eok Kim ) 한국응용생명화학회 2012 Journal of Applied Biological Chemistry (J. Appl. Vol.55 No.4
While cultivating crops, it is important to predict the biological half-lives of applied pesticides to ensure the safety of agricultural products. Dissipation patterns of the triazole fungicides, such as diniconazole and metconazole, during the cultivation of apple were established by utilizing the dissipation curve. As well as, the biological half-lives of the pesticides in apples were calculated using the residue amounts of them. The apples were harvested from 0 to 14 days after spraying diniconazole (WP) and metconazole (SC) at a recommended and three times of the recommended dose. Initial concentrations of diniconazole in apple were 0.09 and 0.15 mg/kg at a recommended and three times of the recommended dose, respectively, which were below MRL 1.0 mg/kg established by KFDA. The equations of biological half-life were Ct=0.0811e-0.179x(half life: 3.9 days) and Ct=0.1451e-0.148x (half life: 4.7 days), respectively. In case of metconazole, initial concentrations in apple were 0.10 and 0.25 mg/kg, below MRL 1.0mg/kg, and biological half-life equations were Ct=0.0857e-0.055x (half life: 12.6 days) and Ct=0.2304e-0.052x (half life: 13.3 days), respectively. Therefore, when triazole fungicides were applied during the cultivation of apple, the biological half-life need to be calculated with the optimal equation model.
연구논문 : 컨조인트 기법을 적용한 풍력발전의 다속성 가치 추정
배정환 ( Jeong Hwan Bae ),안지운 ( Ji Woon Ahn ) 한국환경정책학회 2008 環境政策 Vol.16 No.3
As a solution to present fossil energy depletion crisis and climate change, wind power has attention among EU, USA, Japan as well as our country. However, recent experience in fostering wind power shows significant negative impacts on residents as well as natural environment. This study aims at extracting multi-attributes of wind power and deriving part-worth of each attribute applying conjoint analysis. The attributes confine local economic growth, enhancement of energy security, air quality improvement, distortion of ecosystem, and change of landscape. Econometric models applied in the analysis are multinomial logit and rank-ordered logit model. We found people are inclined to evaluate value of positive attributes much higher than that of negative attributes. The other important findings show that people living in local areas or having been in wind power complex evaluate the value of local economic growth effect, distorted ecosystem, and damaged landscape higher than people living in metropolitan areas or not having been in the wind power complex.
국내 미등록 유기인계 농약의 수입 농식품에 대한 다성분 잔류분석법
전영환 ( Young Hwan Jeon ),황정인 ( Jeong In Hwang ),안지운 ( Ji Woon Ahn ),김효영 ( Hyo Young Kim ),도정아 ( Jung Ah Do ),오재호 ( Jae Ho Oh ),황인균 ( In Gyun Hwang ),임무혁 ( Moo Hyeog Im ),이중근 ( Joong Keun Lee ),이영득 ( Yo 한국환경농학회 2012 한국환경농학회지 Vol.31 No.3
BACKGROUND: For safety evaluation of imported agri-food in Korea, the multiresidue analysis method was establised for unregistered organophosphorus pesticides, aspon, chlorthion, chlorthiophos, crotoxyphos, demeton-O, demeton-S, demeton-S-methyl, dioxathion, heptenophos, iodofenphos, leptophos, methyl-trithion, propetamphos and sulfotep. METHODS AND RESULTS: The used method for multiresidue analysis in brown rice and orange used as representative samples of imported agri-food was the official method of Korean Food and Drug Administration. The results of validation test of 13 organophosphorus pesticides except crotoxyphos for multiresidue analysis method are compared to the criteria such as specificity, linearity, accuracy, precision and limit of quantification. CONCLUSION: The used method for multiresidue analysis of unregistered 13 organophosphorus pesticides except crotoxyphos in Korea can surely be used as an official method for routine analysis of imported agri-food.
다공성 규조토 컬럼을 이용한 한약재 중 잔류농약 분석법 개선
황정인(Jeong-In Hwang),전영환(Young-Hwan Jeon),김효영(Hyo-Young Kim),김지환(Ji-Hwan Kim),안지운(Ji-Woon Ahn),석다롱(Da-Rong Seok),이윤정(Yoon-Jeong Lee),박주영(Ju-Young Park),김도훈(Do-Hoon Kim),김장억(Jang-Eok Kim) 한국농약과학회 2011 농약과학회지 Vol.15 No.2
The official analytical method of residue pesticides in herbal medicines by KFDA cannot be applied to all of the pesticides and herbal medicines because of various active materials in herbal medicines and various physicochemical properties of pesticides. Moreover, liquid-liquid partition uses harmful solvents such as methylene chloride and is consuming a lot of time and effort. In order to improve the problems, we have studied for the availability of the analytical method applying the macroporous diatomaceous earth (MDE) column instead of liquid-liquid partition to simultaneously analyze five pesticides in two dried herbal medicines The results showed that the recovery rates of acetamiprid and azoxystrobin in Astragalus root by GC/ECD ranged from 89.6 to 94.1%, from 86.8 to 94.4%, respectively, and those of bifenthrin, chlorfenapyr, chlorpyrifos in Cnidii Rhizoma by GC/MS ranged from 83.6 to 88.4%, from 77.4 to 83.8%, from 82.6 to 84.3%, respectively. Also, the coefficients of variation (CV) for triplication ranged from 0.5 to 1.7%. The results satisfied the criteria of residue pesticide analysis, setting 70~120% for the recovery rate and below 10% for the coefficient of variation. The improved methods are safer to residue pesticide analysts, faster and less laborious than the KFDA official method.
유통 중인 관행 및 인증 농산물 중 곡류와 엽채류의 잔류농약 모니터링 및 안전성 평가
김효영 ( Hyo Young Kim ),전영환 ( Young Hwan Jeon ),황정인 ( Jeong In Hwang ),김지환 ( Ji Hwan Kim ),안지운 ( Ji Woon Ahn ),정덕화 ( Duck Hwa Chung ),김장억 ( Jang Eok Kim ) 한국환경농학회 2011 한국환경농학회지 Vol.30 No.4
BACKGROUND: This study was conducted to monitor the current status of pesticide residues and to assess their risk in domestic agricultural products. The samples were rice, barley, lettuce and perilla leaf. These four types of agricultural products were those with GAP(Good Agricultural Practice) certification, organic agricultural products, pesticide-free agricultural products or general agricultural products. METHODS AND RESULTS: They were purchased from traditional markets and supermarkets of 12 regions in Korea from July to August 2010. The total number of samples was 259 for agricultural products and these were analyzed by GC/ECD, GC/NPD and GC/MSD. We used multiresidue methods to analyze for 110 different pesticides except for herbicides. CONCLUSION: In this study, residual pesticides were detected in 18 samples. Among these general agricultural products, organic agricultural products and products with GAP-certification were detected in 12, 4 and 2 samples, respectively. Detection rates of general agricultural products, organic agricultural products and products with GAP-certification were 4.6%, 1.5% and 0.8% respectively. Pesticides were not detected in pesticide-free agricultural products. Their detection levels were less than their maximum residue levels. Their estimated daily intakes ranged from 0.0003% to 0.04302% of their acceptable daily intakes, of which the values have no effect on human health.
살균제 Boscalid의 살포방법에 따른 인삼의 부위별 잔류 양상
황정인(Jeong-In Hwang),전영환(Young-Hwan Jeon),김효영(Hyo-Young Kim),김지환(Ji-Hwan Kim),안지운(Ji-Woon Ahn),김기수(Ki-Su Kim),유용만(Yong-Man Yu),김장억(Jang-Eok Kim) 한국농약과학회 2011 농약과학회지 Vol.15 No.4
This study was conducted to identify the residue patterns of fungicide boscalid in ginseng cultivated for 4 or 6 years treated by various spraying methods. The pesticide was sprayed separately on ginseng according to safe use guideline, and the field was divided into three groups and they were traditional, soil and vinyl mulching applications. The maximum residue amounts of boscalid were 0.76 mg/kg in traditional application group, 0.69 mg/kg in soil application group, 0.62 mg/kg in vinyl mulching application group in the whole part of 4 years old ginseng, respectively. These residue levels in ginseng exceeded the maximum residue limit established by Korea Food & Drug Administration, which is 0.3 mg/kg.