| CdTe量子点荧光猝灭法测定微量铅 |
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| 引用本文： | 陈志兵,李梦瑶,陈静,胡莉萍,张洋.CdTe量子点荧光猝灭法测定微量铅[J].光谱实验室,2012,29(2):686-689. |
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| 作者姓名： | 陈志兵 李梦瑶 陈静 胡莉萍 张洋 |
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| 作者单位： | 1. 宿州学院化学与生命科学学院,安徽省宿州市汴河路71号,234000
2. 宿吉林燃料乙醇有限公司,吉林省吉林市经济技术开发区工农路1号,132101 |
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| 基金项目： | 国家自然科学基金项目(20871089);安徽省教育厅重大项目(KJ2010ZD09);安徽省优秀青年人才基金项目(2009SQRZ173ZD);宿州学院科研平台开放课题(2010YKF05);大学生科研项目(KYLXLKZD06) |
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| 摘 要： | 以CdTe量子点作为荧光探针,基于荧光猝灭法对铅进行了定量检测,考察了缓冲溶液体系、量子点浓度、反应时间等多种因素的影响。实验结果表明,在pH 7.5的0.2mol/L Na2HPO4-NaH2PO4缓冲液中,反应时间为10min,铅浓度为2.0×10-6—3.5×10-5mol/L范围时,其线性回归方程为ΔF=26.35+11.47C(×10-6mol/L),相关系数和检出限分别为0.9991和1.8×10-8mol/L。该方法灵敏度高,为铅的测定提供了新的方法。
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| 关 键 词： | CdTe量子点 铅 荧光猝灭 |
Determination of Trace Lead by Fluorescence Quenching Method of CdTe Quantum Dots |
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| CHEN Zhi-Bing
,
LI Meng-Yao
,
CHEN Jing
,
HU Li-Ping
,
ZHANG Yang.Determination of Trace Lead by Fluorescence Quenching Method of CdTe Quantum Dots[J].Chinese Journal of Spectroscopy Laboratory,2012,29(2):686-689. |
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| Authors: | CHEN Zhi-Bing LI Meng-Yao CHEN Jing HU Li-Ping ZHANG Yang |
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| Institution: | CHEN Zhi-Bing LI Meng-Yao CHEN Jinga HU Li-Ping ZHANG Yang(Department of Chemistry & Biology,Suzhou College,Suzhou,Anhui 234000,P.R.China)a(Jilin Feul Alcohol Company Limited,Jilin,Jilin 132101,P.R.China) |
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| Abstract: | Using CdTe quantum dots(QDs) as fluorescent probe,Pb2+ was quantitatively detected basing on PL quenching method of CdTe QDs.The influences of buffer solution system,concentration of QDs,and the reaction time were investigated.The results indicated that in 0.2mol/L Na2HPO4-NaH2PO4(pH 7.5) buffer solution with reaction time of 10 min,the emission intensity of CdTe QDs,and the concentration of Pb2+ follow the linear equation in the range of 2.0×10-6—3.5×10-5mol/L and the obtained linear fitting equation was:ΔF=26.35+11.47C(×10-6mol/L) with the correlation coefficient of 0.9991.The limitation of detection was 1.8×10-8mol/L.CdTe QDs can provide a new luminescent probe for detecting Pb2+ with a extremely high sensitivity. |
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| Keywords: | CdTe Quantum Dots Lead Fluorescence Quenching |
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