In analyzing pesticide residue, LLE (liquid liquid extraction) is generally applied as one of the existing methods, but needed quite a lot of organic solvents and analytical apparatuses for the sample pre-treatment. In addition to its long analysis time and complex analytical processes, it is required to develop a more rapid and efficient method at present. In order to establish an economic and simple pesticide residue analytical method, this study carried out a comparative experiment on the existing analytical method with a new sample pre-treatment method named QuEChERS (quick, easy, cheap, effective, rugged and safe), which extracts and refines pesticide components by directly adding solid powder into the sample. Both the two analytical methods showed favorable values of correlation coefficient (R²> 0.99) of calibration curves. In terms of the detection limit (identification limit), imidacloprid showed 0.02 mg/kg, while the rest of pesticides showed a level around 0.05 mg/kg. The results of this experiment revealed that the recovery of LLE was 92.8-100.9% and the RSD was below 2.5%. On the other hand, the recovery of QuEChERS was 92.2-101.6% and RSD was below 1.9%. As a result of comparing the amount of pesticide residue by the time between the two analytical methods by using Paired t-Test, there was no significant difference between the two analytical methods as the p-value ranged from 0.3148-0.9890. Considering the results of the two methods, the QuEChERS method had similar recovery, compared to the analytical method using the existing LLE, and the analytical time was shortened by about one fourth of that of the existing method. Moreover, since it excludes the use of harmful organic solvents like dichloromethane during the process of extraction, thus leading to protecting experimenters health and remarkably reducing the amount of disused solvents, it is judged as an echo-friendly and economic analytical method.

QuEChERS

Residue (chemistry)

Sample Preparation

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GC/ECD와 GC/MS를 이용한 농산물 중 Picoxystrobin의 분석법 개발

한국환경농학회지 = Korean journal of environmental agriculture (2012)

권혜영 김찬섭 박병준 Il Hwan Kim 홍수명

BACKGROUND: This study was conducted to develop analytical method for picoxystrobin in agricultural commodities using GC/ECD and GC/MS. METHODS AND RESULTS: Each steps of analytical method were optimized for determining picoxystrobin residues in various agricultural commodities. The developed methods include acetone extraction, n-hexane/saline water partition and florisil column chromatography for analysis of all samples (apple, potato, green pepper, hulled rice and soybean), and in addition to these steps, solid phase extraction (SPE) was used for analysis of green pepper and n-hexane/acetonitrile partition was used for analysis of hulled rice and soybean, The instrumental conditions were tested for quantitation in GC/ECD and for confirmation in GC/MS. Recovery was in the range of 86∼109% with RSD ≤10.2% and the quantitation limits (LOQ) of method were 0.025 mg/kg in all agricultural commodities. CONCLUSION: The result showed that the developed method can be used to determine picoxystrobin residue in agricultural commodities.

Residue (chemistry)

Hexane

Solid phase extraction

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농약의 노출 평가를 위한 수계예측모형의 적용

농약과학회지 (2014)

손경애 김찬섭 길근환 김택겸 권혜영

Pesticide is used to protect the crops, but also become a cause of polluting the environment. Perform a risk assessment using physical and chemical properties, environmental fate and toxicity data in order to determine the pesticide registration. The aquatic model estimates pesticide concentrations in water bodies that result from pesticide applications to rice paddies and apple orchard. The used models are the PRZM, EXAMS and AGRO shell (PA5), Rice Water Quality Model (RICEWQ) and Screening Concentration In GROund Water (SCI-GROW). The residual concentration of water body was estimated using meteorological data, crop calendar and soil series of Korea. The chosen pesticides were butachlor, carbofuran, iprobenfos and tebuconazole. It has shown the potential that the RICEWQ is possible to predict residue level in water of butachlor and iprobenfos, because the maximum value in water monitoring data is lower than the peak concentration of the model, and the minimum value is lower than the average annual concentration of the model. But RICEWQ was insufficient to predict exposure concentrations in ground water. The estimated exposure concentrations of carbofuran in ground water is very higher than in surface water because of its low soil adsorption coefficient. Although tebuconazole were not detected in the water monitoring that means very low concentration, it is possible that the PA5 can be used to predict residue level in water.

Carbofuran

Butachlor

Tebuconazole

Paddy field

Puddling

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Analysis of 236 Pesticides in Apple for Validation of Multiresidue Method using QuEChERS Sample Preparation and PTV-GC/TOFMS Analysis

THE KOREAN JOURNAL OF PESTICIDE SCIENCE (2011)

주옥정 권혜영 박병준 김찬섭 진용덕

QuEChERS

Sample Preparation

Sample (material)

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전국 하천수 중 잔류우려 농약 실태조사

한국환경농학회지 (2019)

황인성 오예진 권혜영 Jin‐Ho Ro Danbi Kim

우리나라 주요 하천수의 사용 중인 농약의 실태조사를 위해서 전국 50지점을 선정 후, 1차 (농약 사용 비성수기, 4/5월)및 2차(농약 사용 성수기, 8/9월)로 나누어 실시를 하였다. 하천수 모니터링 결과 농약 1차, 2차 때 각각 11, 28개의 농약이 검출되었다. 농약은 7월부터 기온이 올라가면서 병·해충 방제를 위해 농약사용량이 증가하기 때문에 2차시기에 농약검출량이 증가한 것으로 판단된다. 검출빈도 10회 이상의 농약은 1차 시기에는 butachlor, carbofuran, 2차 시기에는 tricyclazole, azoxystrobin, chlorantraniliprole, thiamethoxam, isoprothiolane 5종이었다. 검출농약은 대부분 수도용 농약으로 검출비율은 90%, 81%로 높게 나타났다. 이러한 이유는 하천수 중 잔류농약은 논에서 사용된 농약이 비산되어 직접적으로 하천수로 잔류되기도 하며 또는 토양에 잔류된 농약이 논물을 방류하면서 하천수로 이동하기 때문이다. 네 개의scenario를 이용하여 위해성 평가를 진행하였을 때, butachlor, carbofuran, carbendazim, chlorantranilprole 및 oxadiazon 에서 잠재위해성 및 위해성이 있는 것으로 평가되었다. 추후모니터링 연구와 수서생물에 위해성이 나타나지 않는 농도 이하로 잔류할 수 있도록 농약안전사용기준 설정연구가 필요 할 것으로 보인다.

Butachlor

Carbofuran

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고정예산제를 활용한 외국의 약제비 관리와 시사점

보건경제와 정책연구(구 보건경제연구) (2011)

권혜영 양봉민

건강보험에서 의약품에 지출되는 비용은 국민소득수준 증가, 인구 고령화 및 만성질환자의 증가에 따른 의료욕구의 증가와 신의료기술의 발전에 따른 이용 증가 등을 이유로 지속적으로 늘어나고 있다. 지난 2006년 정부는 『5.3 약제비 적정화방안』을 통해 지속적으로 증가하는 약제비를 절감하고자 하는 강력한 의지를 표명함으로써, 선별등재방식(positive list system), 보험자의 약가협상 절차, 처방형태에 대한 평가 강화 및 유통구조개선 등 대대적인 개혁을 꾀한바 있다. 약제비 적정화방안이 시행되고 3년 이상이 경과한 현재, 정부 정책에 대한 평가연구를 통해 정책의 효과를 논하여야 하나, 최근 약제비 현황을 살펴보면 정부의 이러한 조치가기대만큼의 효과를 발휘하지 못하는 것으로 보인다. 우리나라의 약제비 규제는 가격중심의 통제방식으로 이루어져왔다. 약제비 규제는 가격과 수량측면에서 이루어져야 효율적으로 관리될 수 있으며 이런 측면에서 지출예산을 규제하는 것은 하나의 대안이 될 수 있다. 본 연구에서는 외국에서 적용하고 있는 약제비 고정 예산제(fixed budget)의 고찰을 통해 효율적인 약제비 관리방식에 대하여 제언하고자 한다.

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액체크로마토그래피를 이용한 농산물중 pyribencarb와 대사물 KIE-9749의 잔류 분석법

농약과학회지 = The Korean journal of pesticide science (2016)

권혜영 홍수명 김택겸 김형진 문병철

The aim of this study was to develop an analytical method for the determination of pyribencarb and its metabolite KIE-9749 in agricultural commodities. The experiment was performed with a range of concentrations 0.05~2.5 μg/g in apple, green pepper, potato, hulled rice, soybean, pear, peach, grape and cucumber. Each samples were extracted with acetone and cleaned by dichloromethane/saline water partition and purified with Florisil solid phase extraction (SPE) cartridge and aminopropyl SPE cartridge. Pyribencarb and KIE-9749 were separated and quantified by HPLC/UVD at 265nm using acetonitrile and water as mobile phase. The recoveries of pyribencarb and KIE-9749 were within 78.3~108.4% and 73.9~113.7% with RSD below 12.2% and 15.0%, respectively. The limits of quantification (LOQ) were both 0.05 μg/g. LC/ESI-MS/MS was optimized for confirmation of residue identity.

Solid phase extraction

Residue (chemistry)

Cartridge

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농산물 수출확대를 위한 수출농산물 농약안전사용

한국농약과학회 학술발표대회 논문집 (2009)

진용덕 권혜영 문병철 손경애 임건재

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경도정신지체 비만청소년에게 무용프로그램 적용이 비만지표와 혈중 렙틴, 레지스틴 및 아디포넥틴에 미치는 영향

한국체육과학회지 (2009)

권혜영 이원재 주성범

The purpose of the study was to identify the effects of dance program on obesity indices, blood leptin, resistin and adiponectin of obese adolescence of mental retardation. For the purpose of this study, we selected 16 mentally retareded obese adolescence and divided them into two groups; 8 obese adolescence of mental retardation for dance program group and 8 control group. We asked them to dance program for 12 weeks and then analyzed the effects of the program on the obesity indices/body composition, blood lipid concentration) and blood leptin, resistin and adiponectin. Regarding the changes in obesity indices, dance program group showed significant reduction in fat mass, %body fat 9oabdominal fat and significant reduction in LDL-C after application of the dance program. Regarding the changes in blood leptin, resistin and adiponectin, adiponectin increased significantly and resistin decreased significantly after application of the dance program To conclude, Applying of dance program for obese adolescence of mental retardation will be effectively appeared to decreasing of obesity indices and positive effects blood adiponectin, resistin.

Resistin

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퇴비 및 규산질비료의 장기연용에 따른 토양 물리적특성 변화

한국토양비료학회지 (2000)

박창영 최정 박기도 전원태 권혜영

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