Sensitive Colorimetric Determination of Cyromazine Using a Gold Nanoparticle (Au NP) Based Sensor with Smartphone Detection

Qiang Shi, Ting Wang, Ying Zheng, Qian Guo, Bing Wang & Sujuan Zhu
A highly sensitive colorimetric sensor based on the aggregation of gold nanoparticles (Au NPs) and a smartphone camera as detector is reported for the determination of cyromazine. In the presence of cyromazine, a decrease in the characteristic SPR absorbance peak of Au NPs is observed at 520 nm. A color change in the solution of Au NPs was observed from burgundy to purple and then to blue gray with a red shift of the absorbance...
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