A novel quantum dots-labeled on the surface of molecularly imprinted polymer for turn-off optosensing of dicyandiamide in dairy products

被引:40
作者
Liu, Huilin [1 ]
Zhou, Kaiwen [1 ]
Wu, Dan [1 ]
Wang, Jing [1 ]
Sun, Baoguo [1 ]
机构
[1] Beijing Technol & Business Univ, Beijing Engn & Technol Res Ctr Food Addit, 11 Fucheng Rd, Beijing 100048, Peoples R China
基金
中国国家自然科学基金;
关键词
Quantum dots; Molecularly imprinted polymer; Optosensing; Dicyandiamide; PROTEINS; MELAMINE;
D O I
10.1016/j.bios.2015.10.007
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
A novel optosensing system based on quantum dots (QDs)-labeled on the surface of a molecularly imprinted polymer (MIP) was developed for turn-off fluorescence sensing of dicyandiamide (DCD). The QDs were modified with silica to covalently adhere to the MIP surface, which resulted in a higher fluorescence quantum yield than MIP-coated QDs. Under optimal conditions, there was a linear relationship, with a correlation coefficient of 0.9950, between the fluorescence intensity and the DCD concentration over the range 5-1600 mu mol L-1. The detection limit of this system was 2.7 mu mol L-1. The proposed method exhibited with good recoveries ranging from 95% to 106%. Most importantly, the optosensing approach can be successfully applied for the determination of DCD in dairy products. With excellent sensitivity and selectivity, such simple and cheap materials are potentially suitable for monitoring of DCD in other food, in agriculture and for environmental applications. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:512 / 517
页数:6
相关论文
共 24 条
[1]   OPTICAL-PROPERTIES OF MANGANESE-DOPED NANOCRYSTALS OF ZNS [J].
BHARGAVA, RN ;
GALLAGHER, D ;
HONG, X ;
NURMIKKO, A .
PHYSICAL REVIEW LETTERS, 1994, 72 (03) :416-419
[2]   Surface-grafted molecularly imprinted polymers for protein recognition [J].
Bossi, A ;
Piletsky, SA ;
Piletska, EV ;
Righetti, PG ;
Turner, APF .
ANALYTICAL CHEMISTRY, 2001, 73 (21) :5281-5286
[3]   Semiconductor nanocrystals as fluorescent biological labels [J].
Bruchez, M ;
Moronne, M ;
Gin, P ;
Weiss, S ;
Alivisatos, AP .
SCIENCE, 1998, 281 (5385) :2013-2016
[4]   Selective optosensing of clenbuterol and melamine using molecularly imprinted polymer-capped CdTe quantum dots [J].
Bui The Huy ;
Seo, Min-Ho ;
Zhang, Xinfeng ;
Lee, Yong-Ill .
BIOSENSORS & BIOELECTRONICS, 2014, 57 :310-316
[5]   Quantum dot bioconjugates for ultrasensitive nonisotopic detection [J].
Chan, WCW ;
Nie, SM .
SCIENCE, 1998, 281 (5385) :2016-2018
[6]   Inhibition of ammonium oxidation by a liquid formulation of 3,4-Dimethylpyrazole phosphate (DMPP) compared with a dicyandiamide (DCD) solution in six new Zealand grazed grassland soils [J].
Di, Hong Jie ;
Cameron, Keith C. .
JOURNAL OF SOILS AND SEDIMENTS, 2011, 11 (06) :1032-1039
[7]   Colorimetric Determination of Melamine in Dairy Products by Fe3O4 Magnetic Nanoparticles-H2O2-ABTS Detection System [J].
Ding, Ning ;
Yan, Na ;
Ren, Cuiling ;
Chen, Xingguo .
ANALYTICAL CHEMISTRY, 2010, 82 (13) :5897-5899
[8]   SEPARATION OF AMINO-ACIDS, PEPTIDES AND PROTEINS ON MOLECULARLY IMPRINTED STATIONARY PHASES [J].
KEMPE, M ;
MOSBACH, K .
JOURNAL OF CHROMATOGRAPHY A, 1995, 691 (1-2) :317-323
[9]   RETRACTED: Ultrasensitive detection of vitamin B6 using functionalised CdS/ZnS core-shell quantum dots (Retracted Article) [J].
Koneswaran, Masilamani ;
Narayanaswamy, Ramaier .
SENSORS AND ACTUATORS B-CHEMICAL, 2015, 210 :811-816
[10]   Sonochemical Synthesis of Cyclodextrin-Coated Quantum Dots for Optical Detection of Pollutant Phenols in Water [J].
Li, Haibing ;
Han, Cuiping .
CHEMISTRY OF MATERIALS, 2008, 20 (19) :6053-6059