Colorimetric detection of ractopamine and salbutamol using gold nanoparticles functionalized with melamine as a probe
文献类型: 外文期刊
第一作者: Wang, Peilong
作者: Wang, Peilong;Su, Xiaoou;Zhou, Ying;Zhao, Hong;He, Yujian;He, Yujian
作者机构:
关键词: Colorimetric;Gold nanoparticles;Melamine;Ractopamine;Salbutamol
期刊名称:TALANTA ( 影响因子:6.057; 五年影响因子:5.386 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: A highly selective and sensitive method is developed for colorimetric detection of ractopamine and salbutamol using gold nanoparticles (AuNPs) functionalized with melamine (MA), respectively. The presence of these β-agonists induces the aggregation of gold nanoparticles through hydrogen-bonding interaction that was accompanied by a distinct change in color and optical properties, which could be monitored by a UV-vis spectrophotometer or even naked eyes. This process caused a significant decrease in the absorbance ratio (A_(670) nm/A_(520) nm) of melamine-gold nanoparticles (MA-AuNPs), and the color changed from wine red to blue. The systems exhibited a wide liner range, from 1×10~(-10) M to 5×10~(-7) mol/L with a correlation coefficient of 0.995 for ractopamine, and 1×10~(-10) M to 1×10~(-5) mol/L with a correlation coefficient of 0.996 for salbutamol, with measuring the absorbance ratio (A_(670) nm/A_(520) nm). The detection limit of these β-agonists is as low as 1×10 ~(-11) mol/L. Particularly, the developed method has been applied to the analysis of real swine feed samples and has achieved satisfactory results.
分类号: O65
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