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QuEChERS 법을 이용한 Rat 조직내 Pyraclofos 잔류 분석 및 급성독성 평가
표민정 ( Min Jung Pyo ),하도윤 ( Do Yun Hah ),최유정 ( You Jeong Choi ),정귀옥 ( Kwi Ok Jeong ),한창희 ( Chang Hee Han ),박영호 ( Young Ho Park ),김민희 ( Min Hee Kim ),김원규 ( Won Gyu Kim ),정진권 ( Jing Gune Jung ),김문기 ( Mun 한국동물위생학회 2015 한국동물위생학회지 (KOJVS) Vol.38 No.3
Environmental pesticides used for insect control can be transferred from plants to animals even to livestock animals through food chain. Human beings also can be exposed to pesticides by consuming polluted dairy products, including meats, eggs and other milk products. Therefore, the Ministry of Food and Drug Safety (MFDS) established Standard for Pesticide Residue Limits in dairy products. The QuEChERS (quick, easy, cheap, effective, rugged and safe) methods for detecting residual pesticides are relatively well established for fruits and vegetables, however, the methods for meat have not been appropriately studied yet. In the present work, pyraclofos was used as an organophosphate pesticide to examine its tissue residue in experimental animals by QuEChERS methods. For this, pyraclofos (150mg/kg body weight) was orally administered to male rats once a day for 2 days. After 6, 12, and 24 hr of the treatment, the tissue residues in liver and femoral muscle of the rats were determined using QuEChERS methods followed by HPLC analyses. In preliminary studies, the recovery rates of spiking samples of pyraclofos demonstrated approximately 109∼110% from the tissues. In previous study, pyraclofos tissue residues were observed with significantly high levels in livers and muscles at 6 hr of oral treatment. Then, they were almost completely disappeared after 24 hr of the administration, indicating the orally exposed pyraclofos is rapidly absorbed and distributed to body organs, then quickly excreted from the body with a negligible level of tissue residue. The alterations in blood chemistry as well as the histopathology of heart, lung, liver, spleen and kidney have also been investigated in the experimental animals for assessing acute toxic effects of pyraclofos. The obtained blood chemistry indexes (ALT and AST) showed maximum peak values at 12 hr after the oral administration and decreased to the normal levels at 24 hr of the treatment. Histopathologic observation exhibited acute hepatic damages at 24 hr of the treatment. In conclusion, we suggest that QuEChERS method can be adequately optimized for the analysis of pyraclofos residues in animal tissues.
황색고구마 및 수박 초임계이산화탄소 추출물이 들기름의 산화안정성에 미치는 영향
이교연,김아나,이혜영,표민정,최성길,Lee, Kyo-Yeon,Kim, Ah-Na,Lee, Hye Young,Pyo, Min Jeong,Choi, Sung-Gil 한국식품영양학회 2021 韓國食品營養學會誌 Vol.34 No.4
This study was carried out to investigate the effects of supercritical carbon dioxide (SC-CO<sub>2</sub>) extracts from sweet potatoes (SP) and watermelon (WM) on the oxidative stability of perilla seed oils (POs) over the existing ones. A comparison was done between the oxidative stability of perilla oil (PO) after the addition of 0.1% of SP, and WM extracts and PO without extract. The oxidative stability was measured based on the viscosity, acid value (AV), peroxide value (POV), antioxidant (DPPH) activity, p-anisidine value (p-AV), and fatty acid composition. The viscosities ranges were: PO without extract, from 53.99±0.99 to 74.38±1.61 cps, PO with SP extract, from 53.99±0.10 to 58.73±0.8 cps, and PO with WM extract, from 53.98±0.10 to 56.00±0.70 cps. While the PO containing the SC-CO<sub>2</sub> extracts had significantly lower AV, POV, and p-AV, their antioxidant activity was approximately 10 times higher than that of the PO without extract. There were no significant differences in fatty acid composition between SC-CO<sub>2</sub> extracts added groups and PO without extract (p<0.05). The findings of this study confirmed that the SC-CO<sub>2</sub> extracts from sweet potatoes and watermelon enhanced the oxidative stability of perilla seed oils, and are potential natural antioxidants for use in the food industry.