广西师范大学学报（自然科学版） ›› 2012, Vol. 30 ›› Issue (3): 218-223.

• • 上一篇    下一篇

用2-巯基吡啶做分子探针SERRS光谱测定痕量金

蒋治良, 韦燕燕, 王盛棉, 李昆, 梁爱惠   

  1. 广西师范大学环境与资源学院,广西桂林541004
  • 收稿日期:2012-05-15 出版日期:2012-09-20 发布日期:2018-12-04
  • 通讯作者: 蒋治良(1965—),男,广西桂林人,广西师范大学教授,博导。E-mail:zljiang@mailbox.gxnu.edu.cn
  • 作者简介:蒋治良,男,博士,研究员,教授,博士生导师
  • 基金资助:
    国家自然科学基金资助项目(21075023,21267004)

SERRS Determination of Trace Gold(Ⅲ) Using 2-Mercaptopyridine as Molecular Probe

JIANG Zhi-liang, WEI Yan-yan, WANG Sheng-mian, LI Kun, LIANG Ai-hui   

  1. College of Environmental and Resource,Guangxi Normal University,Guilin Guangxi 541004,China
  • Received:2012-05-15 Online:2012-09-20 Published:2018-12-04

摘要： 以PEG10000和柠檬酸三钠做稳定剂,硼氢化钠作还原剂,制备稳定的纳米银溶胶。在pH6.6的磷酸氢二钠-磷酸二氢钠缓冲溶液和氯化钠的存在下,纳米银形成较稳定的聚集纳米银溶胶,2-巯基吡啶(MP)吸附在纳米银聚集体表面并在1 002 cm-1处有一个较强的表面增强共振拉曼散射(SERRS)峰。当加入Au3+时,可导致MP在1 002 cm-1处的SERRS峰强度线性降低。在选定条件下,Au3+在0.5~3.0 nmol/L与SERRS峰强度的降低值呈良好线性关系。据此建立了一种简单快速测定Au3+的SERRS定量分析方法。

关键词: 金, 2-巯基吡啶, 聚集纳米银, 表面增强拉曼散射, 定量分析

Abstract: A stable nanosilver solution was prepared,using PEG10000 as stabilizerand NaBH4 as reducer.In pH6.6 Na2HPO4-NaH2PO4 buffer solution containing PEG10000 and NaCl,nanosilvers were aggregated to form the stable aggregated-nanosilvers (ANS) that interact with the chromophore of 2-mercaptopyridine (MP) to obtain an ANS-MP surface-enhanced resonance Raman scattering (SERRS) probe,whichexhibited a strong SERRS peak at 1 002 cm-1.When Au3+ was added,the SERS intensity at 1 002 cm-1 decreased as the complex of Au3+-MP formed and ANSparticles precipitate to the bottom.In the optimal condition,the decreased SERRS intensity was linear to Au3+ concentration in the range of 0.5～3.0 nmol/L.Based onthis,anew sensitive SERS method has been proposed for the determination of trace Au3+ in the synthetic sample with satisfactory results.

Key words: gold(Ⅲ), 2-mercaptopyridine, aggregated-nanosilversuspension, surface-enhanced resonance Raman scattering, quantitative analysis

中图分类号: 

  • O657.3
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