CAJ | 학술논문

基于农药甲胺磷对CdSe/ZnS量子点荧光猝灭的现象，建立了一种简单快速测定农药甲胺磷的新方法．在最佳实验条件下，CdSe/ZnS量子点的荧光猝灭程度与甲胺磷浓度在4．72×10-7～7．08×10-6 mol/L范围内呈线性关系，相关系数为0．9988，检出限为2．5×10-7 mol/L ．本法已成功用于大米及莴苣叶菜中农药甲胺磷残留的检测，加入回收率在91．7％～106．7％之间．利用紫外-可见光谱及透射电子显微镜技术，探讨了甲胺磷对CdSe/ZnS量子点荧光的猝灭机理．
기우농약갑알린대CdSe/ZnS양자점형광졸멸적현상，건립료일충간단쾌속측정농약갑알린적신방법．재최가실험조건하，CdSe/ZnS양자점적형광졸멸정도여갑알린농도재4．72×10-7～7．08×10-6 mol/L범위내정선성관계，상관계수위0．9988，검출한위2．5×10-7 mol/L ．본법이성공용우대미급와거협채중농약갑알린잔류적검측，가입회수솔재91．7％～106．7％지간．이용자외-가견광보급투사전자현미경기술，탐토료갑알린대CdSe/ZnS양자점형광적졸멸궤리．
A simple and rapid method for methamidophos determination was developed based on the fluorescence quenching of CdSe/ZnS quantum dots by methamidophos . Under the optimized conditions ,the linear range of CdSe/ZnS QDs fluorescence intensity versus the concentration of methamidophos was 4 .72 × 10-7 -7 .08 × 10 -6 mol/L ,with a correlation coefficient (R) of 0 .998 8 and a limit of detection of 2 .5 × 10-7 mol/L .The proposed method has been applied to the determination of methamidophos in rice and lettuce leaves with standard recoveries of 91 .7% -106 .7% .The fluorescence quenching mechanism was further investigated by using UV-vis absorption spectra and TEM technique .