期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 246, 期 -, 页码 510-517出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.02.096
关键词
Sulfonamides; Molecularly imprinted; Quantum dot; Optosensing sensor
资金
- National Natural Science Foundation of China [31372572]
- Zhejiang Provincial Natural Science Foundation of China [LR16C190001]
- Public Science and Technology Research Funds Projects of Ocean [201405035]
- Technology Innovation Team of Ningbo city [2015C110018]
- project of Zhejiang Provincial Food and Drug Administration [2015002]
- Scientific Research Fund of Ningbo University [xkzsc1412]
- K.C. Wong Magna Fund in Ningbo University
Two types of molecularly imprinted silica layers appended to quantum dots (MIP-QDs) for sulfonamides (SAs) were fabricated using reverse microemulsion surface grafting with 3-aminopropyltriethoxysilane as a functional monomer and sulfadimethoxine (SDM) and sulfadiazine (SDZ) as template molecules. The characterizations of both MIP-QDs were analyzed by ATR-FT-IR, SEM, and TEM, and their imprinting and specific fluorescence quenching mechanisms were elucidated through selectivity fluorescence response experiments. Finally, the MIP-QDs synthesized with SDZ as template exhibited excellent selective fluorescence quenching properties, which were attributed to the complementary imprinting cavities of the MIP-QDs to the templates and to the specific interactions between the functional monomer and the template molecules. Furthermore, a selective MIP-QD-based fluorescence optosensing sensor for the highly selective and sensitive recognition of SDZ was developed and successfully applied to detect SDZ in sea-water and shrimp samples. Under optimal conditions, linear relationships with correlation coefficients 0.9971 were obtained along the range of 0.005-1.5 mg/L to SDZ. The limit of detection was 0.004 mu g/L and 0.79 mu g/kg for SDZ in seawater and shrimp samples, respectively. Excellent recoveries (82.7-99.9%) with a relative standard deviation (below 6.1%) were obtained for both samples spiked with three levels of SDZ. The proposed MIP-QD method provides a powerful tool for the rapid and sensitive determination of SDZ in real samples. (C) 2017 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据