分子印迹聚合物
检出限
双酚A
胶体金
分子印迹
材料科学
聚合物
纳米颗粒
线性范围
兴奋剂
电化学
电化学气体传感器
化学
纳米技术
核化学
色谱法
电极
选择性
有机化学
光电子学
物理化学
催化作用
复合材料
环氧树脂
作者
En Han,Yingying Pan,Lei Li,Jianrong Cai
出处
期刊:Food Chemistry
[Elsevier]
日期:2023-11-01
卷期号:426: 136608-136608
被引量:13
标识
DOI:10.1016/j.foodchem.2023.136608
摘要
A facile electrochemical sensor based on nano gold-doped molecularly imprinted polymer (MIP) was proposed to realize the selective detection of bisphenol A (BPA) with enhanced sensitivity. Initially, gold-doped MIP (Au@MIP) film was constructed by electropolymerizing p-aminobenzoic acid (PABA) and BPA with in situ gold reduction to distribute gold nanoparticles nearby the imprinted cavities. Subsequently, the template molecules were further extracted from the polymer film, then the MIP could rebind with the template molecules to achieve specific detection of BPA. The nano gold-doped MIP increased the effective surface area and promoted conductivity when BPA was oxidized in the imprinted cavities, which improved the determination sensitivity. Under optimal conditions, the prepared sensor displayed a linear range from 0.5 to 100 μM for BPA detection with a detection limit of 52 nM. The designed sensor was further used to detect BPA in food samples, obtaining satisfactory recoveries from 96.7% to 107.6%.
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