Document Detail


Bare gold nanoparticles as facile and sensitive colorimetric probe for melamine detection.
MedLine Citation:
PMID:  23037802     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
In this study, we demonstrate a more sensitive colorimetric assay for the detection of melamine based on the strong attraction between exocyclic amine groups of melamine and surface-bound AuCl(4)(-)/AuCl(2)(-) ions on bare gold nanoparticles prepared by the borohydride reduction method. This method is rather simple without further modification of gold nanoparticles and complicated pretreatment of samples. The detection limit of the method is 2.0 × 10(-7) g L(-1) for melamine in infant formula, which is much lower (about 1000-fold) than that of using citrate-capped GNPs as a colorimetric probe. The proposed scheme could be a good alternative means for on-site and real-time screening of melamine adulterant in infant formula without costly instruments.
Authors:
Wei Chen; Hao-Hua Deng; Lei Hong; Zeng-Qiang Wu; Sheng Wang; Ai-Lin Liu; Xin-Hua Lin; Xing-Hua Xia
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-5
Journal Detail:
Title:  The Analyst     Volume:  -     ISSN:  1364-5528     ISO Abbreviation:  Analyst     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-5     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372652     Medline TA:  Analyst     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Pharmaceutical Analysis, Fujian Medical University, Fuzhou 350004, China. chenandhu@163.com.
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