Visual and light scattering spectrometric method for the detection of melamine using uracil 5'-triphosphate sodium modified gold nanoparticles.
A highly selective method was presented for colorimetric determination of melamine using uracil 5'-triphosphate sodium modified gold nanoparticles (UTP-Au NPs) in this paper. Specific hydrogen-bonding interaction between uracil base (U) and melamine resulted in the aggregation of AuNPs, displaying variations of localized surface plasmon resonance (LSPR) features such as color change from red to blue and enhanced localized surface plasmon resonance light scattering (LSPR-LS) signals. Accordingly, the concentration of melamine could be quantified based on naked eye or a spectrometric method. This method was simple, inexpensive, environmental friendly and highly selective, which has been successfully used for the detection of melamine in pretreated liquid milk products with high recoveries.
Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China; School of Environmental and Chemistry Engineering of Chongqing Three Gorges University, Chongqing 404000, China.
Lijiao
L
Liang
Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China. Electronic address: zsj@swu.edu.cn.
Shujun
S
Zhen
Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China; College of Pharmaceutical Science, Southwest University, Chongqing 400715, China. Electronic address: chengzhi@swu.edu.cn.
Chengzhi
C
Huang
D000818:Animals; D000067493:Dynamic Light Scattering; D005506:Food Contamination / Q000032:analysis; D006046:Gold / Q000737:chemistry*; D006860:Hydrogen Bonding; D053768:Metal Nanoparticles / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D008892:Milk / Q000737:chemistry; D009994:Osmolar Concentration; D011122:Polyphosphates / Q000737:chemistry; D020349:Surface Plasmon Resonance / Q000379:methods*; D014227:Triazines / Q000032:analysis* / Q000737:chemistry; D014498:Uracil / Q000031:analogs & derivatives* / Q000737:chemistry*
D011122:Polyphosphates; D014227:Triazines; D014498:Uracil; D006046:Gold; C011907:melamine; C005692:triphosphoric acid
Gold nanoparticles; Hydrogen-bonding; Melamine; UTP