锰掺杂硫化锌量子点室温磷光检测铅离子
Determination of Lead Ion Based on Quenching of Room Temperature Phosphorescence of Mn-doped ZnS Quantum Dots
查看参考文献16篇
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文摘
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采用锰掺杂硫化锌量子点室温磷光(RTP)探针,基于Pb~(2+)对其磷光的猝灭现象进行选择性测定,考察了量子点溶液浓度、缓冲液体系及浓度、反应时间、干扰物质等多种因素影响,在最优条件下,即25μmol/L量子点溶液在Tris-HCl(10 mmol/L,pH 7.4)缓冲液中,反应时间为2 min时,检测Pb~(2+)的线性范围为0.25~1000 μmol/L,检出限为0.04 μmol/L,方法的精密度和准确度良好。本方法简单、快速、灵敏度和选择性较好,线性范围较宽,可用于96孔板进行高通量检测,并成功应用于生物样品中Pb~(2+)的选择性检测,在稀释5倍人血浆中检测Pb~(2+)的线性范围为5~1000 μmol/L,检出限为0.48 μmol/L。 |
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其他语种文摘
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Room temperature phosphorescence (RTP) property of Mn-doped ZnS quantum dots (QDs) was explored to develop a novel method for selective detection of lead cation. The influence factors such as buffer kinds and their concentration, the concentration of Mn-doped ZnS QDs solution, reaction time and coexisting substances were studied. It was found that under optimized conditions, i.e. 10 mmol/L Tris-HCl buffer at pH 7.4 and 2 min reaction time, the relative RTP intensity of the Mn-doped ZnS QDs was quenched linearly by lead cation in the concentration range from 0.25 to 1000μmol/L, and the limit of detection was 0.04 μmol/L (8.3 μg Pb/L). This method was also applied to measure lead cation in biosamples using a high-throughput 96 well plate with a wide linear range, simpleness, rapidness, high sensitivity and selectivity, and cost effectiveness. The RTP was quenched linearly by lead cation in human plasma in the concentration range from 5 to 1000 μmol/L, and the limit of detection was 0.48 μmol/L (Pb 99 μg/L), respectively. |
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来源
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分析化学
,2012,40(11):1680-1685 【核心库】
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关键词
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量子点
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锰掺杂硫化锌
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磷光
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铅离子
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地址
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1.
军事医学科学院毒物药物研究所, 北京, 100850
2.
沈阳药科大学药学院, 沈阳, 110016
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语种
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中文 |
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ISSN
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0253-3820 |
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学科
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化学 |
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基金
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国家重大科技专项
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文献收藏号
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CSCD:4675836
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