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| 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 |
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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.
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Received: 2016-12-26
Accepted: 2017-03-09
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[1] Reimschuessel R, Puschner B. Journal of Medical Toxicology, 2016, 6：468.
[2] Yang S P, Ding J H, Zheng J, et al. Analytical Chemistry, 2009, 81：2426.
[3] Zhou Q Q, Liu N, Qie Z W, et al. J. Agr. Food. Chem.，2011, 59) 12006.
[4] Ping H, Zhang M W, Li H K, et al. Food Contro.，2012, 123：191.
[5] Xavier S S J, Karthikeyan C, Kumar G G, et al. Anal. Methods，2014, 6：8165.
[6] Zhou Y Y, Yang J, Liu M, et al. Journal of Luminescence，2010, 130：817.
[7] Sun K J, Deng Q L, Guo T, et al. RSC Adv.，2015, 5：94084.
[8] Zhang X F, Zou M Q, Qi X H, et al. J. Raman Spectrosc., 2010, 41：1655.
[9] Lang T T, Panga S, He L L. Anal. Methods., 2015, 7：6426.
[10] Ou L J, Li X Y, Li L J, et al. Analyst，2015, 140：1871.
[11] Wang H B, Zhang H D, Chen Y, et al. Sens. Actuators, B，2015, 220：146.
[12] Dong Z Z, Zhang L, Qiao M, et al. Talanta，2016, 146：253.
[13] Qing T P, Qing Z H, Mao Z G, et al. RSC Adv.，2014, 4：61092.
[14] Song Q W, Shi Y, He D C, et al. Chem-Eur J. 2015, 21：2417.
[15] Zhu H, S. Zhang X, Li M X, et al. Chem. Commun.，2010, 46：2259. |
|
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