基于氧硫功能团载体的铅离子电位传感器的研究与进展

系统总结归纳了基于氧硫功能团载体的铅离子电位传感器,具体涉及到蒽醌、芳羧酸、羧酸酯、磷酸酯和含酰胺、硫酰胺大环化合物等.蒽醌类载体普遍具有较快的铅离子响应速度,响应时间为2s.含硫芳香羧酸对铅离子的传感普遍较为敏感,构建不对称膜后,探检出限改善至6.0× 10-10 mol/L.磷酸酯则具有很强的抗干扰能力,大部分金属离子选择系数logK均小于-3.0.而含酰胺基团的大环化合物载体已构建成微型传感器,从而可探测受限于3 μL测量池的样品,检出限达2.7×10-9 mol/L.

Development of Potentiometric Lead Ion Sensors Based on Ionophores Bearing Oxygen/Sulfur Functional Groups

Potentiometric Pb(Ⅱ) sensors based on oxygen/sulfur functional groups-bearing ionophores,including anthraquinone,aromatic carboxylic acid,carboxylate,phosphate and macrocyclic compounds containing amide or thioamide groups,are systematically summarized.Anthraquinone is found to be quickly responsive ionophores to lead ions with the shortest response time of down to 2 s.Aromatic carboxylic acid with sulfur atom as an ionophore in an asymmetric membrane sensitively responds to lead ions with detection limit of 6.0×10-10 mol/L.Phosphate has advantage of better anti-interference ability with the selective coefficient logK of smaller than 3.0.The macrocyclic amide compound as ionophore has been assembled into microelectrode for sensing confined sample in a 3-μL measuring cell with a superior lower detection limit of 2.7×10-9 mol/L.