Hydrogen-bonding recognition-induced color change of gold nanoparticles for visual detection of melamine in raw milk and infant formula.
The color change induced by triple hydrogen-bonding recognition between melamine and a cyanuric acid derivative grafted on the surface of gold nanoparticles can be used for reliable detection of melamine. Since such a color change can be readily seen by the naked eye, the method enables on-site and real-time detection of melamine in raw milk and infant formula even at a concentration as low as 2.5 ppb without the aid of any advanced instruments.
Ai
Kelong
K
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, PR China.
Liu
Yanlan
Y
Lu
Lehui
L
D000818:Animals; D003124:Colorimetry; D006046:Gold / Q000737:chemistry*; D006860:Hydrogen Bonding; D041943:Infant Formula / Q000737:chemistry*; D053768:Metal Nanoparticles; D008892:Milk / Q000737:chemistry*; D015394:Molecular Structure; D014227:Triazines / Q000032:analysis* / Q000737:chemistry*
D014227:Triazines; D006046:Gold; C004632:cyanuric acid; C011907:melamine