Polysulfone as an alternative material to PVC in the design of ion-selective electrodes
Polysulfone as an alternative material to PVC in the design of ion-selective electrodes
复制标题
DOI：
10.1016/j.snb.2005.10.040
复制
发表时间：
2006-06-26
影响因子：
8.4
通讯作者：
Fabregas, Esteve
中科院分区：
文献类型：
--
作者：
Gonzalez-Bellavista, Anna;Macanas, Jorge;Fabregas, Esteve
聚砜（PS）。一种非导电聚合物被用作聚氯乙烯（PVC）的替代材料，聚氯乙烯是迄今为止在离子选择性电极（伊势）膜的设计中最常用的聚合物。选择硝酸盐-ISE作为模型电极，研究PS作为膜的聚合物基体的效率。以四辛基硝酸铵为离子载体，邻硝基苯辛基醚为增塑剂。优化了聚合物/增塑剂/离子载体的比例，并对制备的电极的分析性能参数进行了评价。电极显示45和60 mV/decade之间的斜率（取决于校准介质和膜组成）。在1.0 × 10 ~（-4）~ 3.0 × 10 ~（-2）M范围内线性范围响应，寿命至少为1个月。相对于其他阴离子，电极对硝酸根表现出良好的选择性。(c)2005 Elsevier B. V.保留所有权利。
Polysulfone (PS). a non-conductive polymer, is employed as an alternative material to polyvinyl chloride (PVC), the most used polymer in the design of ion-selective electrode (ISE) membranes to date. A nitrate-ISE is chosen as a model electrode to study the efficiency of PS as a polymer matrix of the membrane. Tetra-octyl ammonium nitrate is used as ionophore and 2-nitrophenyl octyl ether as plasticizer. The polymer/plasticizer/ionophore ratio is optimized and the analytical performance parameters of the prepared electrodes are evaluated. The electrodes show a slope between 45 and 60 mV/decade (depending on the calibration medium and membrane composition). A linear range response between 1.0 x 10(-4) and 3.0 x 10(-2) M, and a lifetime of at least I month are obtained. The electrodes exhibit good selectivity for nitrate in respect to other anions. (c) 2005 Elsevier B.V. All rights reserved.