• Title, Summary, Keyword: pesticide residues

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Development and Validation of an Official Analytical Method for Determination of Ipfencarbazone in Agricultural Products using GC-ECD (GC-ECD를 이용한 농산물 중 Ipfencarbazone의 신규분석법 개발 및 검증)

  • Jang, Jin;Kim, Heejung;Lee, Eun-Hyang;Ko, Ah-Young;Ju, Yunji;Kim, Sooyeon;Chang, Moon-Ik;Rhee, Gyu-Seek
    • The Korean Journal of Pesticide Science
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    • v.19 no.3
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    • pp.210-217
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    • 2015
  • Ipfencarbazone is a herbicide of the tetrazolinone class, and is believed to be an inhibitor of very long chain fatty acids (VLCFAs), which control cell division in weeds. The objective of this study was to develop and validate an official analytical method for ipfencarbazone determination in agricultural products. The ipfencarbazone residues in agricultural products were extracted with acetone, partitioned with n-hexane, and then purified through silica SPE cartridge. Finally, the analyte was quantified by gas chromatograph-electron capture detector (GC-ECD) and confirmed with gas chromatograph/mass spectrometer(GC/MS). The linear range of ipfencarbazone was 0.01 to 1.0 mg/L with the coefficient of determination ($r^2$) of 0.9999. The limit of detection (LOD) and quantification (LOQ) was 0.003 and 0.01 mg/kg, respectively. In addition, average recoveries of ipfencarbazone ranged from 80.6% to 112.3% at the different concentration levels LOQ, 10LOQ and 50LOQ, while the relative standard deviation was 2.2-8.6%. All values were consistent with the criteria ranges requested in the CODEX guidelines. Furthermore, and inter-laboratory study was conducted to validate the method. This proposed method for determination of ipfencarbazone residues in agricultural products can be used as an official analytical method.

A Monitoring Survey on Pesticide Residues in Strawberries and Cucumbers from plastic Film Houses (시설재배 딸기와 오이 중 농약잔류에 관한 조사 연구)

  • 이해근;김영구;박영선
    • Journal of Food Hygiene and Safety
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    • v.3 no.4
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    • pp.193-202
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    • 1988
  • A pesticide monitoring study was undertaken for the strawberry and cucumber samples collected from plastic film houses and additional strawberries from supermarkets located in Seoul city in 1983 to evaluate pesticide residues in these food commodities and also to give basic informations in establishing maximum residue limits. Organophosphorus insecticides were not detected in any cucumber samples except that diazinon found with low residue levels in two strawberry samples. Fungicide procymidone and chlorothalonil were detected with considerable high frequencies in these vegetables while their residue levels were fairly low. Even the maximum residue levels. they were much lower than maximum residue limits established in these vegetables in Environment Administration. Korea. Of the strawberries from supermarkets in Seoul city, procymidone, chlorthalonil and dichlofluanid fungicides were also detected with similar detection frequencies and residue levels to those from the plas tic film houses. By washing the strawberries with tap water, the residues were removed from 38% to 95% of the total residues. Presently, it is considered that pesticide residues in strawberry and cucumber may be no harmfullevels for food commodities.

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Nitrate Content and Organophosphorus Pesticide Residues in Edible Part of Organic Farming Vegetables (시판 유기농법 재배 채소류의 질산염 및 유기인계 잔류농약의 함량)

  • 박영숙
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.27 no.3
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    • pp.471-476
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    • 1998
  • The NO3 contents and organophosphorus pesticide residues in edible part of vegetables cultivated by a conventional or an organic farming methods were determined. The NO3 contents of vegetables cultivated by the organic farming method were between 120ppm and 4,523ppm, whereas its contents of vegetables cultivated by the conventional farming method were between 89ppm and 1,575ppm. Fifty two percent of vegetables cultivated by hte organic farming method accumulated NO3 content over than 2,000ppm, whereas 82% vegetables cultivated by the conventional farming method accumulated NO3 content below than 1,000ppm. The NO3 contents of lettuce dependent on the cultivation method obviously. The NO3 contents of lettuce cultivated by a hydroponic farming method were between 4,800 and 6,500ppm, whereas those cultivated by the conventional method were between 630 and 750ppm. The organophosphorus pesticide residues in edible part of vegetables cultivated by the conventional or the organic farming methods were not detected. The NO3 contents in edible part of vegetables cultivated by the organic farming method should be considered as one of several parameters to judge a real safe vegetable to be certified by goverment.

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Monitoring of Pesticide Residues in Vegetables Collected in Chungbuk, Korea (충북지역에 유통되는 일부 채소 농산물의 잔류농약 모니터링)

  • Woo, Nariyah;Ko, Sung-Hee;Park, Yong-Jeen
    • The Korean Journal of Food And Nutrition
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    • v.26 no.4
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    • pp.865-878
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    • 2013
  • This study is being executed to investigate the pesticide residues for agricultural products on the markets in Chungbuk area from 2010 to 2012. The samples used were chard, perilla leaf, leek, spinach, crown daisy, marsh mallow, and winter grown cabbage, These were analyzed by GC/MSD and GC/ECD. Agricultural pesticide levels of spinach was 23.4%, winter grown cabbage 20.6%, chard 14.9%, marsh mallow 14.0%, perilla leaf 13.1%, leek 8.4%, and crown daisy 5.6%. Exceeds of residual pesticides were spinach, chard, leek, perilla leaf, and marsh mallow. Based on these results, a risk assessment was being conducted by used a percentage of acceptable daily intake (%ADI). The %ADI ranged from 0.00014% to 1.73910%, and these values was indicated to have no effects on human health.

Monitoring of Pesticide Residues and Risk Assessment on Agricultural Products Marketed in the Northern Area of Seoul in 2013 (2013년 서울북부지역 유통농산물의 잔류농약 모니터링 및 위해성 평가)

  • Kim, Nam Hoon;Lee, Jeong Sook;Kim, Ouk Hee;Choi, Young Hee;Han, Sung Hee;Kim, Yun Hee;Kim, Hee Sun;Lee, Sae Ram;Lee, Jeong Mi;Yu, In Sil;Jung, Kwon
    • Journal of Food Hygiene and Safety
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    • v.29 no.3
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    • pp.170-180
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    • 2014
  • The aim of this study was to investigate pesticide residues in 2,877 market vegetables in the northern area of Seoul in 2013. Pesticide residues in the samples were analysed by multiresidue method for 285 pesticides using GC-ECD/NPD and HPLC-DAD/FLD. 385 samples(13.4%) were detected with pesticide residues at or below MRL, and 15 samples(0.5%) were found to detect pesticide residues exceeding MRL. The most frequently detected samples were sedum(63.6%), chamnamul(45.8%), leek(44.5%) and green&red pepper(30.8%). Among the 15 violated samples, leek(5 cases) and welsh onion(4 cases) showed the highest violation rate. A total of 74 samples(18.5%) contained multiple pesticide residues in one vegetable. Procymidone, chlorofenapyr and cypermethrin were the pesticide most frequently found. As a tool of risk assessment through the consumption of pesticide detectable agricultural products, the ratio of estimated daily intake (EDI) to acceptable daily intake (ADI) was calculated into the range of 1.05~28.61%. The results have meant that there was no health risk through dieting commercial agricultural products detected with pesticide residues.

Pesticide Residues Survey on Agricultural Products before Auction at Whole Market in Busan Area during 2006~2008 (2006~2008년 부산지역 농산물도매시장 경매 전 농산물의 잔류농약 조사)

  • Kwon, Sun-Mok;Park, Eun-Hee;Kang, Jeong-Mi;Jo, Hyeon-Cheol;Jin, Seong-Hyeon;Yu, Pyeong-Jong;Ryu, Byeong-Sun;Jeong, Gi-Ho
    • The Korean Journal of Pesticide Science
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    • v.14 no.2
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    • pp.86-94
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    • 2010
  • This study was conducted to monitor the current status of pesticide residues in agricultural products before auction at whole markets in Busan area from March 2006 to December 2008. Of the 7,237 samples that were analyzed by multiresidue methods, 1,164 samples (16.1%) had pesticide residues and 231 samples (3.2%) exceeded the maximum residue limits (MRLs). 181 samples of the 231 samples exceeding MRLs were applied to the tentative limits because the use of the pesticides for the agricultural products was not established against the MRLs in the Korea Food Code, and it is equivalent to 78.4%. The order of pesticides exceeding MRLs was endosulfan, procymidone, chlorothalonil, ethoprophos, chlorpyrifos, diethofencarb, kresoxim-methyl and EPN. Of 211 samples with two or more pesticides residues, the residues exceeded the MRLs in 80 samples and it is equivalent to 37.9%. This study results suggested that pesticide residues exceeding MRLs could be attributed to the use of inapplicable pesticides for agricultural products and the use of two or more pesticides.

Development and validation of an analytical method for fungicide fenpyrazamine determination in agricultural products by HPLC-UVD (HPLC-UVD를 이용한 살균제 fenpyrazamine의 시험법 개발 및 검증)

  • Park, Hyejin;Do, Jung-Ah;Kwon, Ji-Eun;Lee, Ji-Young;Cho, Yoon-Jae;Kim, Heejung;Oh, Jae-Ho;Rhee, Kyu-Sik;Lee, Sang-Jae;Chang, Moon-Ik
    • Analytical Science and Technology
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    • v.27 no.3
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    • pp.172-180
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    • 2014
  • Fenpyrazamine which is a pyrazole fungicide class for controlling gray mold, sclerotinia rot, and Monilinia in grapevines, stone fruit trees, and vegetables has been registered in republic of Korea in 2013 and the maximum residue limits of fenpyrazamine is set to grape, peach, and mandarin as 5.0, 2.0, and 2.0 mg/kg, respectively. Very reliable and sensitive analytical method for determination of fenpyrazamine residues is required for ensuring the food safety in agricultural products. Fenpyrazamine residues in samples were extracted with acetonitrile, partitioned with dichloromethane, and then purified with silica-SPE cartridge and eluted with hexane and acetone mixture. The purified samples were determined by HPLC-UVD and confirmed with LC-MS and quantified using external standard method. Linear range of fenpyrazamine was between $0.1{\sim}5.0{\mu}g/mL$ with the correlation coefficient (r) 0.999. The average recovery ranged from 71.8 to 102.7% at the spiked level of 0.05, 0.5, and 5.0 mg/kg, while the relative standard deviation was between 0.1 and 7.3%. In addition, limit of detection and limit of quantitation were 0.01 and 0.05 mg/L, respectively. The results revealed that the developed and validated analytical method is possible for fenpyrazamine determination in agricultural product samples and will be used as an official analytical method.

Dietary Exposure Assessment by Ages due to Pesticide Residues in Vegetables (채소류 섭취에 따른 연령별 잔류농약 노출평가)

  • Jang, Mi-Ra;Moon, Hyun-Kyung;Kim, Tae-Rang;Yuk, Dong-Hyun;Kim, Eun-Hee;Hong, Chae-Kyu;Choi, Chae-Man;Hwang, In-Sook;Kim, Jung-Hun;Kim, Moo-Sang;Chae, Young-Zoo
    • The Korean Journal of Pesticide Science
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    • v.16 no.1
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    • pp.21-27
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    • 2012
  • Dietary exposure assessment by ages was performed in this study using pesticide residues data examined in vegetable commodities collected in Seoul from 2007 to 2009, and the vegetable intakes for Seoulites which were obtained after analysing the Korea National Health and Nutrition examination survey data of 2008. There was a statistical difference for vegetable intakes by ages (P<0.001). Vegetable intake was the highest in 40~59 age group and was the lowest in under 5 age group. The %ADI was calculated using vegetable pesticide residues and vegetable intake for Seoulites by ages. Considering below 1 of the %ADI by ages, the risk caused by pesticide residues in vegetables was very low and vegetable intake was safe.

Monitoring of Pesticide Residues in Commercial Environment-friendly Stalk and Stem Vegetables and Leafy Vegetables and Risk Assessment (유통 친환경 엽채류와 엽경채류 중 잔류농약 실태조사 및 안전성 평가)

  • Lee, Jae-Yun;Noh, Hyun-Ho;Lee, Kwang-Hun;Park, So-Hyun;Kyung, Kee-Sung
    • The Korean Journal of Pesticide Science
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    • v.16 no.1
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    • pp.43-53
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    • 2012
  • In order to monitor the levels of pesticides in environment-friendly stalk and stem vegetables and leafy vegetables selling at markets in Korea. A total of 637 (395 organic agricultural products, 242 pesticide-free agricultural products) samples of 21 stalk and stem vegetables and leafy vegetables were collected twice from markets in July and August 2010 in Korea. Pesticide residues in samples were analyzed by multiresidue method for 240 pesticides using GC-ECD/NPD and HPLC-DAD/FLD. The suspected-pesticides were confirmed with a GC-MSD. As a result of analysis, six pesticides were detected from eight samples, representing a detection rate of 1.3% and amounts of pesticide residues in samples were as follows: alachlor 0.043, chlorfenapyr 0.022-0.324, diazinon 0.024, dicofol 0.009-0.138, dithiopyr 0.008, metolachlor 0.025 mg/kg. Their residue levels were below the MRLs. Estimated daily intakes (EDIs) of the pesticides detected from stalk and stem vegetables and leafy vegetables were less than 25% of their acceptable daily intakes (ADIs), representing that residue levels of the pesticides detected were evaluated as safe for consumption. However, five samples containing pesticide residues were unsuitable environment-friendly products because of pesticides detected more than their 10% MRLs in organic and pesticide-free agricultural products.

Development of an Analytical Method for the Determination of Pyriofenone residue in Agricultural Products using HPLC-UVD (HPLC-UVD를 이용한 농산물 중 살균제 pyriofenone 분석법 확립)

  • Park, Hyejin;Kim, HeeJung;Do, Jung-Ah;Kwon, Ji-Eun;Yoon, Ji-Young;Lee, Ji-Young;Chang, Moon-Ik;Rhee, Gyu-Seek
    • The Korean Journal of Pesticide Science
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    • v.18 no.2
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    • pp.79-87
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    • 2014
  • Pyriofenone is an aryl phenyl ketone fungicide that is newly registered in Korea in 2013 to control powdery mildew on food. The objective of this study was to develop reliable and sensitive analytical method for determination of pyriofenone residue in agricultural products for ensuring the food safety. The pyriofenone residues in all samples(Korean melon, pepper, potato, mandarin, soybean, and hulled rice) were extracted with acetonitrile, partitioned with dichloromethane, and then purified with a silica cartridge. The purified samples were analyzed by HPLC-UVD and confirmed with LC-MS. The linear range of pyriofenone was 0.05~5 mg/kg with the correlation coefficient ($r^2$) > 0.999. Average recoveries of pyriofenone ranged from 72.8% to 99.5% at the spiked level of 0.05 and 0.5 mg/kg, while the relative standard deviation was 2.3%~6.4%. In addition, the limit of detection and limit of quantification were 0.01 and 0.05 mg/kg, respectively. The results revealed that the developed and validated analytical method was suitable for pyriofenone determination in agricultural products.