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건조과정을 통한 구기자의 Benomyl 잔류량 변화의 확인에 관한 연구
조성용 ( Sung Yong Jo ),김용범 ( Yong Beom Kim ),심주연 ( Ju Yeon Sim ),황준혁 ( Jun Hyuk Hwang ),강은옥 ( Eun Ok Kang ),경기성 ( Kee Sung Kyung ) 한국환경농학회 2020 한국환경농학회 학술대회집 Vol.2020 No.-
This study was carried out to determine effect of drying on benomyl residue in Chinese matrimony vine. The test commercial pesticide, benomyl 50% WP, was diluted 2,000-fold and then the diluted solution was sprayed 2 times onto Chinese matrimony vine at 7-day intervals. Samples were collected after last spraying (0 day), 7 and 14 days and then dried with a hot-air oven to make the dried product. Residue of benomyl was calculated by conversion of carbendazim obtained to benomyl on the bais of their molecular weight. The limits of quantitation of carbendazim were all 0.01 mg/kg. The recoveries of carbendazim in fresh and dried product ranged from 87.4 to 104.2% and from 72.6 to 75.4%, respectively. The amounts of benomyl residues in fresh was slowly decreased after spraying. The residual amounts of benomyl in fresh and dried product at day 0 were 0.89 and 1.14 mg/kg, indicating that benomyl residue was increased in the dried product by removing of water.
갯기름나물 중 Hexythiazox와 Fenpropathrin의 잔류 특성
김용범 ( Yong Beom Kim ),조성용 ( Sung Yong Jo ),심주연 ( Ju Yeon Sim ),황준혁 ( Jun Hyuk Hwang ),강은옥 ( Eun Ok Kang ),경기성 ( Kee Sung Kyung ) 한국환경농학회 2020 한국환경농학회 학술대회집 Vol.2020 No.-
This study was carried out to investigate dissipation patterns of hexythiazox and fenpropathrin in coastal hogfennel. The test commercial hexythiazox 10% WP and fenpropathrin 5% EC were diluted 2,000- and 1,000-time, respectively, and then the diluent were sprayed 2 times with 7-day intervals before harvest onto the test crop. Samples were collected at 0, 3, 5, 7 and 14 days after the last spraying. Limits of quantitation (LOQs) of the test pesticides were all 0.01 mg/kg. Recoveries of hexythiazox and fenpropathrin at 10- and 50-fold levels of their LOQs ranged from 80.3 to 96.3% and from 90.6 to 93.8%, respectively. The highest residues of hexythiazox and fenpropathrin in the crops collected just after spraying were 2.30 and 2.02 mg/kg, respectively, whereas those in the samples collected 14 days after harvest were 0.12 and 0.15 mg/kg, respectively. Also, half-lives of hexythiazox and fenpropathrin in coastal hogfennel were 3.1 and 3.7 days, respectively, indicating that the amount of hexythiazox and fenpropathrin in coastal hogfennel were time-coursely decreased.
갯기름나물 중 Ethoprophos와 Metaldehyde의 잔류 특성
심주연 ( Ju Yeon Sim ),조성용 ( Sung Yong Jo ),김용범 ( Yong Beom Kim ),황준혁 ( Jun Hyuk Hwang ),강은옥 ( Eun Ok Kang ),경기성 ( Kee Sung Kyung ) 한국환경농학회 2020 한국환경농학회 학술대회집 Vol.2020 No.-
This study was carried out to investigate the residual characteristics of insecticide ethoprophos and metaldehyde in coastal hogfennel under greenhouse conditions. The test commercial pesticides, ethoprophos 5% GR and metaldehyde 6% GR were treated onto upland soil surface at the recommended and double dose before planting and then the test crop was transplanted. Sampling was done on the pre-harvest day of 50 days after treatment. To investigate residue change after harvest, additional samples were also collected 7 and 14 days after harvest. Limits of quantitation of ethoprophos and metaldehyde in the crop were all 0.01 mg/kg. Recoveries of ethoprophos and metaldehyde were ranged from 101.8 to 110.2% and from 71.1 to 93.0%, respectively. The residues of ethoprophos in the crop collected at harvest in recommended dose and double dose plots were 0.42 and 0.61 mg/kg, respectively. In case of metaldehyde, those were 0.25 and 1.37 mg/kg, respectively. Also, residues in the test crop collected 7 and 14 days after harvest found to be decreased comparing to those in the crop at harvest. The dissipation rates of the test pesticides in the crop collected 7 and 14 days after harvest were from 60.7 to 61.9% and from 51.1 to 56.0%, respectively, in both recommended and double dose.
이기완,김승재,조성용,김조천 한국공업화학회 2000 응용화학 Vol.4 No.1
Volatile Organic Compounds(VOCs) contribute to the formation of photochemical oxidants and are harmful to human being because of their carcinogenicity and toxicity. VOCs are emitted from many sources such as transporation, surface coating, petroleum refining, and combustion process. It is urgent to remove VOCs from coating process.