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| 谷胱甘肽包被的CdTe量子点作为荧光探针测定微量银 | |
| 引用本文： | 董微,王莹,宋有涛,董焱,周巳琪,曹智星.谷胱甘肽包被的CdTe量子点作为荧光探针测定微量银[J].沈阳医学院学报,2012,14(1):6-8. |
| 作者姓名： | 董微 王莹 宋有涛 董焱 周巳琪 曹智星 |
| 作者单位： | 1. 沈阳医学院基础医学院化学教研室,辽宁沈阳,110034 2. 辽宁大学生命科学院动物资源与疫病防治重点实验室 3. 沈阳药科大学中药学院实验中心 4. 沈阳医学院奉天医院重症医学科 5. 沈阳医学院沈洲医院医保科 |
| 基金项目： | 辽宁省自然基金资助项目,辽宁省教育厅资助项目,沈阳市科技局资助项目,沈阳医学院优秀人才项目 |
| 摘 要： | 目的：建立了一种以CdTe量子点为离子探针测定微量银的新方法。方法：选择谷胱甘肽作为表面修饰剂,合成水溶性CdTe量子点。根据Ag＋对CdTe量子点的荧光猝灭效应,用CdTe量子点作为荧光探针实现了对Ag＋的定量检测。结果：在0.000 1 mol/L、pH值为7.4的磷酸缓冲溶液中,当量子点浓度为0.004 g/L时,反应时间为5 min,体系的相对荧光强度与Ag＋浓度呈良好的线性关系,其线性范围为25.06～98.60μg/L,线性系数为0.995 7,检出限为0.15μg/L。结论：该法已成功应用于实体水样中微量银的测定。 |
| 关 键 词： | 谷胱甘肽 CdTe量子点 荧光探针 银 |
Glutathione-capped CdTe Quantum Dots as Fluorescence Probes for Determination of Silver |
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| DONG Wei , WANG Ying , SONG You-tao , DONG Yan , ZHOU Si-qi , CAO Zhi-xing.Glutathione-capped CdTe Quantum Dots as Fluorescence Probes for Determination of Silver[J].Journal of Shenyang Medical College,2012,14(1):6-8. | |
| Authors: | DONG Wei WANG Ying SONG You-tao DONG Yan ZHOU Si-qi CAO Zhi-xing |
| Institution: | 1.Department of Chemistry,Shenyang Medical College,Shenyang 110034,China;2.Animal Resources and Disease Prevention and Control Key Laboratories,Liaoning University;3.Experiment Center of China Medicine,Shenyang Pharmaceutical University;4.ICU,Fengtian Hospital Affiliated to Shenyang Medical College;5.Medicare Division,Shenzhou Hospital Affiliated to Shenyang Medical College) |
| Abstract: | Objective:To build a new method for the determination of trace of silver ion with CdTe quantum dots(QDs) as ion probe.Method:Water-soluble CdTe QDs were synthesized by chosing L-Glutathione(GSH) as modifying agent in aqueous solution.Based on the quenching of the fluorescence intensity of CdTe QDs by Ag+,the CdTe QDs were used as fluorescence probes for the quantitative determination of amounts of Ag+.Result:When the concentration of QDs was 0.004 g/L in the phosphate buffer at pH 7.4,the reaction time was 5 min,the degree of fluorescence quenching was linear with Ag+ mass concentration in the range of 25.60~98.60 μg/L,with a linear correlation coefficient of 0.995 7.The limit of detection was 0.15 μg/L.Conclusion: This method has successfully applied to the determination of silver in water samples. |
| Keywords: | glutathione CdTe quantum dots fluorescence probe silver |
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