Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Ningbo University, Ningbo 315211, China.
College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315211, China.
Sensors (Basel). 2020 Feb 7;20(3):884. doi: 10.3390/s20030884.
A highly selective and sensitive molecularly imprinted electrochemiluminescence (MIECL) sensor was developed based on the multiwall carbon nanotube (MWCNT)-enhanced molecularly imprinted quantum dots (MIP-QDs) for the rapid determination of cyfluthrin (CYF). The MIP-QDs fabricated by surface grafting technique exhibited excellent selective recognition to CYF, resulting in a specific decrease of ECL signal at the MWCNT/MIP-QD modified electrode. Under optimal conditions, the MIECL signal was proportional to the logarithm of the CYF concentration in the range of 0.2 µg/L to 1.0 × 10 µg/L with a determination coefficient of 0.9983. The detection limit of CYF was 0.05 µg/L, and good recoveries ranging from 86.0% to 98.6% were obtained in practical samples. The proposed MIECL sensor provides a novel, rapid, high sensitivity detection strategy for successfully analyzing CYF in fish and seawater samples.
一种高选择性和高灵敏度的分子印迹电化学发光（MIECL）传感器是基于多壁碳纳米管（MWCNT）增强的分子印迹量子点（MIP-QDs）开发的，用于快速测定氯氟氰菊酯（CYF）。通过表面接枝技术制备的 MIP-QDs 对 CYF 表现出优异的选择性识别能力，导致在 MWCNT/MIP-QD 修饰电极上的电化学发光信号特异性降低。在最佳条件下，MIECL 信号与 CYF 浓度的对数在 0.2 µg/L 至 1.0 × 10 µg/L 范围内呈正比，测定系数为 0.9983。CYF 的检测限为 0.05 µg/L，在实际样品中获得了 86.0%至 98.6%的良好回收率。该 MIECL 传感器为成功分析鱼和海水中的 CYF 提供了一种新颖、快速、高灵敏度的检测策略。
