| 基于硫代巴比妥酸修饰的银纳米粒子对 Pb2 + 的比色分析研究 |
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| 引用本文： | 伍小艳,许云波,杨 帅,祝宁宁.基于硫代巴比妥酸修饰的银纳米粒子对 Pb2 + 的比色分析研究[J].上海师范大学学报(自然科学版),2012,41(2):142-147. |
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| 作者姓名： | 伍小艳 许云波 杨 帅 祝宁宁 |
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| 作者单位： | 上海师范大学 生命与环境科学学院,上海,200234 |
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| 摘 要： | 将硫代巴比妥酸（thiobarbituric acid,TBA）修饰在新制备的银纳米粒子（Ag nanoparti-cles,AgNPs）表面,制备成小型的TBA-AgNPs比色传感器.在相同条件下利用TBA-AgNPs的颜色变化对16种不同金属离子进行分析测定,发现当pH值为11时,该传感器只对Pb2＋有明显响应,其他离子无明显干扰,且A540/A402与Pb2＋的浓度在3.97～27.8μmol/L范围内呈良好的线性关系.该方法具有简便快速,选择性好,结果可视化等优点,有望用于环境样品中Pb2＋的快速测定.
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| 关 键 词： | 银纳米粒子 硫代巴比妥酸 比色传感器 Pb2＋ |
Colorimetric detection of Pb2+ based on thiobarbituric acid ( TBA ) - functionalized Ag nanoparticles |
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| WU Xiao-yan
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XU Yun-bo
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YANG Shuai
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ZHU Ning-ning.Colorimetric detection of Pb2+ based on thiobarbituric acid ( TBA ) - functionalized Ag nanoparticles[J].Journal of Shanghai Normal University(Natural Sciences),2012,41(2):142-147. |
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| Authors: | WU Xiao-yan XU Yun-bo YANG Shuai ZHU Ning-ning |
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| Institution: | (College of Life and Environment Sciences,Shanghai Normal University,Shanghai 200234,China) |
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| Abstract: | A simple and highly selective thiobarbituric acid-modified silver nanoparticles(AgNPs) was synthesized and used as a probe for the colorimetric detection of lead ions(Pb2+),based on the fact that Pb2+ ions induced the aggregation of the AgNPs as a consequence of a chelation process between Pb2+ ion and thiobarbituric acid on the AgNPs.It was found that,at pH 11,TBA-AgNPs displayed good selectivity to Pb2+ ions,and other 15 kinds of metal ions did not interfere.The A540/A402(ratio of adsorption value at 540 and 402 nm) showed a good linear relationship with Pb2+ concentration(c) ranging from 3.97 μmol/L to 27.8 μmol/L.The present method was simple,rapid,highly selective and visible,which offered good potential for rapid detection of Pb2+ in environmental samples. |
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| Keywords: | AgNPs thiobarbituric acid colorimetric Pb2+ |
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