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Citation: FEI Yao, GUO Han, XI Huanxiang, CHEN Wanyi, CAI Linyi, WANG Aijun, FENG Jiuju. Using 2-Thiobarbituric Acid-modified Gold Nanoparticles as Colorimetric Probes for Sensitive Detection of Melamine[J]. Chinese Journal of Applied Chemistry, ;2014, 31(4): 489-495. doi: 10.3724/SP.J.1095.2014.30249 shu

Using 2-Thiobarbituric Acid-modified Gold Nanoparticles as Colorimetric Probes for Sensitive Detection of Melamine

FEI Yao ^a ,
GUO Han ^b ,
XI Huanxiang ^a ,
CHEN Wanyi ^a ,
CAI Linyi ^a ,
WANG Aijun ^a ,
FENG Jiuju ^a,b,,

1.
a College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China;
2.
b School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China

Corresponding author: FENG Jiuju,
Received Date: 20 May 2013
Available Online: 20 May 2013
Fund Project: 国家自然科学基金资助项目(21175118,21275130) (21175118,21275130)

A simple and rapid colorimetric method was developed for the detection of melamine using 2-thiobarbituric acid-modified gold nanoparticles(TBA-AuNPs) as probes.Melamine can induce the aggregation of TBA-AuNPs via the hydrogen-bonding interactions in acetic acid buffer solutions(pH=7),resulting in the color change from wine-red to blue within 15 min at room temperature.Under optimized conditions,the absorption ratio of the A₆₆₀/A₅₂₀ shows good linear relationship with the melamine concentration in the range of 0.062~0.18 μmol/L and 0.18~6.0 μmol/L,respectively,with the detection limit of 0.043 μmol/L.The recoveries of the method are within the range of 102.8%~105.3%.It provides a platform for rapid,selective and sensitive colorimetric detection of melamine in milk samples.
- melamine,
- thiobarbituric acid,
- gold nanoparticles probes,
- colorimetric method
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