Bare gold nanoparticles as facile and sensitive colorimetric probe for melamine detection

被引：59

作者：

Chen, Wei ^{[1
,2
]}

Deng, Hao-Hua ^{[1
,2
]}

Hong, Lei ^{[1
,2
]}

Wu, Zeng-Qiang ^{[3
]}

Wang, Sheng ^{[1
,2
]}

Liu, Ai-Lin ^{[1
,2
]}

Lin, Xin-Hua ^{[1
,2
]}

Xia, Xing-Hua ^{[3
]}

机构：

[1] Fujian Med Univ, Dept Pharmaceut Anal, Fuzhou 350004, Peoples R China

[2] Fujian Med Univ, Nano Med Technol Res Inst, Fuzhou 350004, Peoples R China

[3] Nanjing Univ, Sch Chem & Chem Engn, State Key Lab Analyt Chem Life Sci, Nanjing 210093, Jiangsu, Peoples R China

来源：

ANALYST | 2012年 / 137卷 / 22期

基金：

中国国家自然科学基金;

关键词：

VISUAL DETECTION; LABEL-FREE; INFANT FORMULA; RAW-MILK; RECOGNITION; PRODUCTS; PHASE; DNA;

D O I：

10.1039/c2an35962f

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

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 AuCl4-/AuCl2- 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 x 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.

引用

页码：5382 / 5386

页数：5

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