http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Nafion-DTPA-Glycerol 이 수식된 유리탄소전극을 사용한 미분펄스 전압전류법에 의한 구리(Ⅱ) 이온의 측정
박찬주(Chan Ju Park),박은희(Eun Heui Park),정근호(Keun Ho Chung) 한국환경보건학회 2004 한국환경보건학회지 Vol.30 No.2
A glassy carbon electrode(GCE) modified with nafion-DTPA (diethylene triamine-pentaacetic acid)-glycerol is used for the highly selective and sensitive determination of a trace amount of Cu(II). Various experimental parameters, which influenced the response of nafion-DTPA-glycerol modified electrode to Cu(II), are optimized. The Copper(II) is accumulated on the electrode surface by the formation of the complex in an open circuit, and the resulting surface is characterized by medium exchange, electrochemical reduction, and differential pulse voltammetry(DPV). The electrochemical response is evaluated with respect to concentration of modifier, pH and preconcentration time, quiet time, copper(II) concentration, and other variables. A linear range is obtained in the concentration range 1.0 × 10-8 M~1.0 × 10-6 M Cu(II) with 7 min preconcentration time. The detection limit(3s) is as low as 2.36 × 10-8 M (1.50 ppb).
04 포스터 발표 : 농식품 환경분야(PF) ; PF-14 : 농산물 중 이소자플루톨과 대사체의 분석법 검증 및 측정불확도 추정
김지영 ( Ji Young Kim ),정수지 ( Su Ji Jung ),박은희 ( Eun Heui Park ),김희정 ( Hee Jung Kim ),장문익 ( Moon Ik Jang ),이규식 ( Gyu Seek Rhee ),이종권 ( Jong Kwon Lee ) 한국환경농학회 2015 한국환경농학회 학술대회집 Vol.2015 No.-
Isoxaflutole is classified as a Group 2B carcinogen by IARC and known tobe pigment inhibitor. It works by preventing the biosynthesis of carotenoid pigments, which protect chlorophyll from decomposition by sunlight. The inhibitor of 4-hydroxyphenylpyruvate dioxygenase(HPPD) is the diketonitrile(DKN) derivative of isoxaflutole formed from opening of the isoxazole ring. The DKN is formed rapidly in plants following root and shoot uptake. The DKN is both xylem and phloem mobile leading to high systemicity. In this study, validation of analytical method of Isoxaflutole and its metabolite RPA 202248 were carried out using HPLC/MS-MS and was demonstrated to estimate the measurement uncertainty of Isoxaflutole and its metabolite. The sources of measurement uncertainty (i.e. sample weight, final volume, standard weight, purity, standard solution, calibration curve, recovery and repeatability) in associated with the analysis of Isoxaflutole and its metabolite RPA 202248 were evaluated. Prior to measure of uncertainty, the analytical method was validated for linearity, limit of detection (LOD, 0.003 mg/kg), limit of quantification (LOQ, 0.01 mg/kg), and precision and accuracy (less than a relative standard deviation of 10 %). The content of fortified Isoxaflutole and RPA 202248 from agricultural products was estimated at a 95% confidence level. These validation results demonstrated that the Isoxaflutole and RPA 202248 method could be suitable for the determination of agricultural products and satisfied the performance requirements of CODEX guideline.