载体型电化学传感器对有毒过渡金属离子Pb2+的检测

Detection of Toxic Transition Metal Ion Pb2+ by Carrier Type Electrochemical Sensor

中文关键词:  固接离子选择性电极  载体型电化学传感器  Pb²⁺

英文关键词:solid-contact ion selective electrode  carrier type electrochemical sensor  Pb²⁺

中文摘要:

      设计并制备了一种基于高分子聚合物（甲基丙烯酸甲酯-丙烯酸丁酯共聚物，MMA-BA）和碳纳米复合材料的固接离子选择性电极来检测水中铅离子Pb²⁺.电极使用高聚物MMA-BA作为传感膜的骨架，利用其优良的性质以及多壁碳纳米管的作用显著提高电极的传感性质.电极具有在低检测范围内的响应的特性，可将其应用在饮用水的实际检测中.

英文摘要:

      A solid-contact Pb²⁺-selective-electrodes with polymer-carbon nanotube composites was designed and prepared. In this electrode the methyl methacrylate butyl acrylate copolymer(MMA-BA) was used as the framework of the sensing membrane. The speciality of MMA-BA and polymer-carbon nanotube leads to an excellent reproducibility of the electrode and makes an essential role to enhance the hydrophobicity of the membrane-conductor interface, which contributes to the more stable potential signal by the elimination of undesirable water layer at the interface. The limit of detection in nanomolar range opens the possibility of their use in trace analysis of Pb²⁺ in environmental water samples.