Journal of Guangxi Normal University(Natural Science Edition) ›› 2012, Vol. 30 ›› Issue (3): 218-223.

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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

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

CLC Number: 

  • O657.3
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