Low Kit Meng, Lin Xuanhao, Wu Huanan, Li Sam Fong Yau
Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
Polymers (Basel). 2024 Feb 28;16(5):652. doi: 10.3390/polym16050652.
In this work, the development of a novel method for the detection of mercury (II) ions in wastewater using a mercury ion-imprinted polymer (IIP) combined with a quartz crystal microbalance (QCM) is described. The IIP was successfully synthesized via the polymerization of a of a novel fluorescein- and 2-aminophenol-functionalized methacrylic acid monomer, which was noted to have high binding affinity to mercury (II) ions. This polymer was subsequently coated on a QCM chip to create an IIP-QCM sensor. This sensor was established to have high selectivity and good sensitivity to mercury (II) ions, and had a limit of detection (LOD) of 14.17 ppb, a limit of quantification (LOQ) of 42.94 ppb, a signal-to-noise ratio (S/N) of 4.29, good repeatability, and a working range of 42.94 ppb to 2 ppm. The sensor was also able to analyze tap water and wastewater samples. The IIP-QCM is, therefore, promising as a highly selective, cost-effective, and rapid mercury ion sensor for applications involving the detection of mercury in wastewater.
在这项工作中，描述了一种使用汞离子印迹聚合物（IIP）与石英晶体微天平（QCM）相结合来检测废水中汞（II）离子的新方法的开发。通过一种新型的荧光素和2-氨基苯酚功能化的甲基丙烯酸单体的聚合成功合成了IIP，该单体对汞（II）离子具有高结合亲和力。随后将这种聚合物涂覆在QCM芯片上以创建IIP-QCM传感器。该传感器对汞（II）离子具有高选择性和良好的灵敏度，检测限（LOD）为14.17 ppb，定量限（LOQ）为42.94 ppb，信噪比（S/N）为4.29，具有良好的重复性，工作范围为42.94 ppb至2 ppm。该传感器还能够分析自来水和废水样品。因此，IIP-QCM作为一种用于废水汞检测的高选择性、经济高效且快速的汞离子传感器具有广阔前景。
