Khan Asif Ali, Habiba Umme, Khan Anish
Analytical and Polymer Research Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh 202002, India.
Int J Anal Chem. 2009;2009:659215. doi: 10.1155/2009/659215. Epub 2009 Aug 9.
Poly-o-anisidine Sn(IV) arsenophosphate is a newly synthesized nanocomposite material and has been characterized on the basis of its chemical composition, ion exchange capacity, TGA-DTA, FTIR, X-RAY, SEM, and TEM studies. On the basis of distribution studies, the exchanger was found to be highly selective for lead that is an environmental pollutant. For the detection of lead in water a heterogeneous precipitate based ion-selective membrane electrode was developed by means of this composite cation exchanger as electroactive material. The membrane electrode is mechanically stable, with a quick response time, and can be operated over a wide pH range. The selectivity coefficients were determined by mixed solution method and revealed that the electrode is sensitive for Pb(II) in presence of interfering cations. The practical utility of this membrane electrode has been established by employing it as an indicator electrode in the potentiometric titration of Pb(II).
聚邻茴香胺锡（IV）砷酸盐是一种新合成的纳米复合材料，已通过其化学成分、离子交换容量、热重-差热分析（TGA-DTA）、傅里叶变换红外光谱（FTIR）、X射线、扫描电子显微镜（SEM）和透射电子显微镜（TEM）研究对其进行了表征。基于分布研究，发现该离子交换剂对作为环境污染物的铅具有高度选择性。为了检测水中的铅，利用这种复合阳离子交换剂作为电活性材料，开发了一种基于非均相沉淀的离子选择性膜电极。该膜电极机械稳定性好，响应时间快，可在较宽的pH范围内操作。通过混合溶液法测定了选择性系数，结果表明该电极在存在干扰阳离子的情况下对Pb（II）敏感。通过将该膜电极用作Pb（II）电位滴定中的指示电极，确立了其实际应用价值。
