DDB 肝药作为一种新型的电位钡(II)膜传感器离子载体。

DDB liver drug as a novel ionophore for potentiometric barium (II) membrane sensor.

机构信息

Department of Chemistry, Faculty of Science, Ain Shams University, Cairo, Egypt.

出版信息

Talanta. 2003 Jan 2;59(1):161-6. doi: 10.1016/s0039-9140(02)00464-2.

Abstract

Dimethyl-4,4-dimethoxy-5,6,5',6'-dimethylene dioxy biphenyl-2,2-dicarboxylate (DDB) liver drug is used as a novel ionophore in plasticized poly (vinyl chloride) (PVC) matrix membrane sensors for barium ions. Optimum performance characteristics are displayed by membrane sensor incorporating DDB ionophore, potassium tetrakis(4-chlorophenyl)borate as lipophilic salt, and o-nitrophenyloctyl ether as plasticizer. The sensor exhibits a linear response over the concentration range 10(-1)-10(-5) mol l(-1) BaCl(2) with a Nernstian slope of 30 mV per decade and high selectivity towards Ba(2+) with respect to Li(+), Na(+), K(+), Rb(+), NH(4)(+), Mg(2+), Ca(2+), Sr(2+), Mn(2+), Co(2+), Ni(2+), Cd(2+), Al(3+), La(3+), and Ce(3+) ions. The sensor response is stable over a wide pH range (4-9) and the lifetime is about 2 months. The proposed sensor is successfully applied to the determination of Ba(2+)contents of some rocks.

摘要

二甲氧基-4,4-二甲氧基-5,6,5',6'-亚甲基二氧联苯-2,2-二羧酸酯（DDB）是一种新型的药物离子载体，用于增塑聚氯乙烯（PVC）基质膜传感器中钡离子的测定。在含有 DDB 离子载体、四（对氯苯基）硼酸钾作为亲脂性盐和邻硝基苯辛醚作为增塑剂的膜传感器中显示出最佳的性能特征。该传感器对 BaCl2 的浓度范围在 10(-1)-10(-5)mol l(-1)之间表现出线性响应，Nernst 斜率为 30 mV 每 decade，对 Ba(2+)具有高选择性，相对于 Li(+)、Na(+)、K(+)、Rb(+)、NH(4)(+)、Mg(2+)、Ca(2+)、Sr(2+)、Mn(2+)、Co(2+)、Ni(2+)、Cd(2+)、Al(3+)、La(3+)和 Ce(3+)离子。传感器响应在宽 pH 范围（4-9）内稳定，寿命约为 2 个月。该传感器已成功应用于一些岩石中 Ba(2+)含量的测定。