期刊
TALANTA
卷 239, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.talanta.2021.123130
关键词
Surface molecularly imprinting; Ionic liquid; Chlortetracycline; Electrochemical sensor; Multi-walled carbon nanotube
资金
- National Natural Science Foundation of China [21775112]
A novel electrochemical sensor based on surface molecularly imprinted polymer (SMIP) was constructed for the quantitative detection of chlortetracycline (CTC). The sensor showed high selectivity, sensitivity, and reproducibility, and was successfully applied to determine CTC concentration in real samples.
Chlortetracycline (CTC) is a widely used broad-spectrum antibiotic, its residue likely occurs in the environment and foods, bringing some negative effects to human health. Hence the detection and quantification of CTC in environmental and food samples is relevant. Herein, a novel electrochemical sensor based on surface molecularly imprinted polymer (SMIP) was constructed for the quantitative detection of CTC. The SMIP was synthesized by using ionic liquid (IL) functionalized MWCNT (MWCNT-IL) as supporter, 1-carboxymethyl-3-vinylimidazolium bromide (IL1) as functional monomer, CTC as template, ethylene glycol dimethyl acrylate as crosslinker, and azobisisobutyronitrile as initiator. The obtained composite IL1-SMIP exhibited high adsorption capacity for CTC and the imprinting factor was ca. 4.1. It was found that IL played an important role in improving the property of SMIP, which was also evaluated by DFT-based calculation. The resulting sensor IL1-SMIP/MWCNT-IL/GCE showed high selectivity, sensitivity and reproducibility. CTC could be quantified from 0.4 mu M to 55 mu M with a detection limit of 0.08 mu M (S/N = 3) under the optimized conditions. The practical applicability of the sensor was demonstrated successfully by determining CTC in real samples.
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