基于分子印迹聚合物的微针传感器用于检测食品样品中的吡虫啉农药。
Molecularly Imprinted Polymer-Modified Microneedle Sensor for the Detection of Imidacloprid Pesticides in Food Samples.
机构信息
Department of Physical Sciences, MacEwan University, Edmonton, AB T5J4S2, Canada.
出版信息
Sensors (Basel). 2022 Nov 4;22(21):8492. doi: 10.3390/s22218492.
A portable, molecularly imprinted polymer (MIP)-based microneedle (MN) sensor for the electrochemical detection of imidacloprid (IDP) has been demonstrated. The MN sensor was fabricated via layer-by-layer (LbL) in-tube coating using a carbon nanotube (CNT)/cellulose nanocrystal (CNC) composite, and an IDP-imprinted polyaniline layer co-polymerized with imidazole-functionalized CNCs (PANI-co-CNC-Im) as the biomimetic receptor film. The sensor, termed MIP@CNT/CNC MN, was analyzed using both cyclic voltammetry (CV) and differential pulse voltammetry (DPV) and showed excellent electrochemical performance for the detection of IDP. The CV detection range for IDP was 2.0-99 µM, with limits of detection (LOD) of 0.35 µM, while the DPV detection range was 0.20-92 µM with an LOD of 0.06 µM. Additionally, the MIP@CNT/CNC MN sensor showed excellent reusability and could be used up to nine times with a 1.4 % relative standard deviation (% RSD) between uses. Lastly, the MIP@CNT/CNC MN sensor successfully demonstrated the quantification of IDP in a honey sample.
一种基于分子印迹聚合物（MIP）的可携式微针（MN）传感器已被开发出来，用于电化学检测吡虫啉（IDP）。MN 传感器是通过层层（LbL）在管内涂覆方法，使用碳纳米管（CNT）/纤维素纳米晶体（CNC）复合材料和吡虫啉印迹的聚吡咯共聚合与咪唑功能化的 CNC（PANI-co-CNC-Im）作为仿生受体膜来制备的。该传感器被称为 MIP@CNT/CNC MN，并用循环伏安法（CV）和差分脉冲伏安法（DPV）进行了分析，显示出对 IDP 检测的优异电化学性能。IDP 的 CV 检测范围为 2.0-99 µM，检测限（LOD）为 0.35 µM，而 DPV 检测范围为 0.20-92 µM，检测限（LOD）为 0.06 µM。此外，MIP@CNT/CNC MN 传感器表现出优异的可重复使用性，可使用多达九次，每次之间的相对标准偏差（%RSD）为 1.4%。最后，MIP@CNT/CNC MN 传感器成功地证明了蜂蜜样品中 IDP 的定量检测。
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