Highly Sensitive and Simple Colorimetric Sensor of Melamine in Milk using Cysteamine-Modified Silver Nanoparticles
DOI:
https://doi.org/10.55681/armada.v4i9.3778Keywords:
Colorimetric, Cysteamine, Melamine, Milk, Sensor, Silver NanoparticleAbstract
A simple and rapid method to detect melamine in milk samples using cysteamine-modified silver nanoparticles (CA-AgNPs) is presented. Stable AgNPs with an average particle size of 34.6 nm were successfully synthesized using sodium borohydride as a reducing agent. The thiol group of CA facilitates the grafting of CA on AgNPs substrate via the S-Ag complex. The color change from yellow to pink-purple was observed when CA-AgNPs were exposed to melamine. Quantitative analysis using UV-Vis spectrophotometry showed that the synthesized CA-AgNPs is a selective and sensitive colorimetric sensor for melamine with a limit of detection value of 0.094 µM which was much lower than the safe limits (2.0 µM in the USA) and recovery >90%. With the increased awareness of sustainable development goals, this research is an approach to achieving good health and well-being.
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