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Khay, Sathya,Abd El-Aty, A. M.,Choi, Jeong-Heui,Shin, Eun-Ho,Shin, Ho-Chul,Kim, Jin-Suk,Chang, Byung-Joon,Lee, Chi-Ho,Shin, Sung-Chul,Jeong, Ji Yoon,Shim, Jae-Han WILEY-VCH Verlag 2009 Journal of Separation Science Vol.32 No.2
<P>The principal goal of this work was to develop an efficient method for the simultaneous determination of four pyrethroid (PYR) insecticides, cyfluthrin, cyhalothrin, cypermethrin, and deltamethrin, in porcine muscle and pasteurized milk using liquid–liquid extraction (LLE). Sample extraction was carried out with and without additional column cleanup procedures, and the final determination was made using GC with electron-capture detector (ECD). The pesticide identity was confirmed using GC-MS in the SIM mode. Since there were minor differences between the extraction procedures, extraction without the additional cleanup procedure was used throughout the work. The method was validated by fortifying blank samples with half, two, and four times the maximum residue limit (MRL) of each PYR. The average recoveries (n = 6) ranged from 83.5 to 99.2% and 82.9 to 109% in porcine muscle and pasteurized milk, respectively. The repeatability of measurements expressed as RSDs, was in the range of 1.7–11.9 and 1.5–10.3% in porcine muscle and pasteurized milk, respectively. The LODs ranged from 3.3 to 9 and 3 to 8.1 ppm, whereas the LOQs ranged from 10 to 27.4 and 9 to 24.6 ppm, in porcine muscle and pasteurized milk, respectively. The applicability of the method was demonstrated by analyzing real samples collected from major cities in the Republic of Korea. No residues of the selected pesticides were detected in any of the samples.</P>
간세포암종 진단에서 18F-FDG 양전자 방출단층촬영(PET)의 정확성
신정아 ( Jeong A Shin ),박중원 ( Joong Won Park ),안민 ( Min An ),최준일 ( Joon Il Choi ),김성훈 ( Seong Hoon Kim ),김석기 ( Seok Ki Kim ),이우진 ( Woo Jin Lee ),박상재 ( Sang Jae Park ),홍은경 ( Eun Kyung Hong ),김창민 ( Chang M 대한간학회 2006 Clinical and Molecular Hepatology(대한간학회지) Vol.12 No.4