Sensitive and selective colorimetric detection of cadmium(II) using gold nanoparticles modified with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole

被引：71
|
作者：
Wang, Ai-Jun [1 ,2 ]
Guo, Han [1 ]
Zhang, Ming [1 ]
Zhou, Dan-Ling [2 ]
Wang, Rui-Zhi [1 ]
Feng, Jiu-Ju [1 ,2 ]
机构：
[1] Henan Normal Univ, Sch Chem & Chem Engn, Xinxiang 453007, Peoples R China
[2] Zhejiang Normal Univ, Coll Geog & Environm Sci, Coll Chem & Life Sci, Jinhua 321004, Peoples R China
来源：
MICROCHIMICA ACTA | 2013年 / 180卷 / 11-12期
关键词：
Gold nanoparticles; 4-Amino-3-hydrazino-5-mercapto-1,2,4-triazol; Cadmium ion; Probe; Chelation; VISUAL DETECTION; AQUEOUS-SOLUTIONS; METAL-IONS; ACID; SPECTROMETRY; CYSTEINE; SAMPLES; ASSAY;
D O I：
10.1007/s00604-013-1030-7
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
We have developed a simple, sensitive and selective colorimetric method for the detection of cadmium(II) (Cd2+) using gold nanoparticles modified with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole. Organic solvents or additives are not required. It is found that Cd2+ induces the aggregation of the modified Au-NPs via chelation, leading to a color change from red to blue. This change can be seen with bare eyes, and monitored by UV-vis spectroscopy, transmission electron microscopy and dynamic light scattering. The detection limit is 30 nM (at a signal-to-noise ratio of 3). The new approach was successfully applied to the detection of Cd2+ in spiked samples of tap water and lake water, and the results agree well with those obtained by flame atomic absorption spectroscopy.
引用
收藏
页码：1051 / 1057
页数：7
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