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水相合成高荧光量子产率的谷胱甘肽(GSH)包覆CdSeTe/ZnS量子点,并通过紫外光谱(UV)、荧光光谱(PL)、透射电镜(TEM)和电子衍射(XRD)等手段对其光学特性和结构进行表征.基于CdSeTe/ZnS量子点表面GSH对As3+的特异性结合而导致量子点荧光猝灭作用,构建了基于CdSeTe/ZnS量子点作为荧光探针检测痕量As3+的新方法.探究了As3+对CdSeTe/ZnS量子点荧光猝灭的机理,As3+在5.0～100.0μg/L浓度范围内,CdSeTe/ZnS量子点的荧光强度F0/F与As3+浓度之间呈良好的线性关系,线性相关系数为0.9984,检测限为1.0μg/L.该量子点荧光分析方法可用于实际水样中As3+的检测.“,”Water-soluble CdSeTe/ZnS quantum dots ( QDs) were synthesized with glutathione ( GSH) as stabilizer. Their optical features and structure have been characterized by UV-Visible spectroscopy, photoluminescence ( PL) spectroscopy, transmission electron microscopy ( TEM) and X-ray diffraction ( XRD) in detail. The as-prepared CdSeTe/ZnS QDs were directly used as a recognition probe for the detection of As3+ because of the strong interactions between As3+ and the GSH molecule of CdSeTe/ZnS QDs. Under optimal conditions, the quenched fluorescence intensity ( F0/F) increased linearly with the concentration of As3+ ranging from 5. 0 to 100 μg/L. The limit of detection ( 3σ) for As3+was found to be 1 μg/L. The practical application had been carried out for determination of As3+ in real water samples.