Fluorescent Sensor for Melamine Based on Its Copper Complex Interrupted of AT-dsDNA Copper Nanoparticles
OU Li-juan, SUN Ai-ming, Lü Xiao-long, CHEN Si-yu, WANG Ling-yun, LUO Jian-xin
Key Laboratory of Green Functional Building Materials, College of Material and Chemical Engineering, Hunan Institute of Technology, Hengyang 421002, China
Abstract：A novel turn-off strategy was developed for the melamine (Mel) detection based on melamine-Cu conjugate and subsequent interrupted the formation of AT-dsDNA copper nanoparticles (AT-dsDNA CuNPs). The coordination of melamine to copper cannot make the reduction of Cu2+ to Cu0 enough in the AT24-CuNPs synthesis process, and thereby results in the fluorescence intensity of CuNPs decreasing. Under the optimum conditions, the concentration of melamine showed a good linear relation with the fluorescence response of CuNPs in the range of 1~150 μmol·L-1. The detection limit was 0.5 μmol·L-1. Furthermore, good recoveries were obtained while the proposed method was applied to the analysis of melamine in milk samples.
基金资助: the NSF of China (21205035) and Undergraduate Innovative Test Program of Hunan Institute of Technology (HX1630)
作者简介: OU Li-juan, (1983—)，associate professor College of Material and Chemical Engineering, Hunan Institute of Technology
e-mail:
oulijuanann@163.com
引用本文:
欧丽娟，孙爱明，吕小龙，陈思羽，王凌云，罗建新. 三聚氰胺-铜(Ⅱ)配合物抑制AT-双链铜纳米颗粒合成荧光检测三聚氰胺[J]. 光谱学与光谱分析, 2017, 37(12): 3947-3952.
OU Li-juan, SUN Ai-ming, Lü Xiao-long, CHEN Si-yu, WANG Ling-yun, LUO Jian-xin. Fluorescent Sensor for Melamine Based on Its Copper Complex Interrupted of AT-dsDNA Copper Nanoparticles. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(12): 3947-3952.
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