Analytical Research laboratory, Department of Chemistry, Aligarh Muslim University, Aligarh-202002, India.
J Hazard Mater. 2009 Dec 15;172(1):202-7. doi: 10.1016/j.jhazmat.2009.06.168. Epub 2009 Jul 17.
Samples of zirconium(IV)iodotungstate have been synthesized under varying mixing order and ratios of aqueous solution of potassium iodate, sodium tungstate and zirconium oxychloride at pH 1. A tentative formula was proposed on the basis of chemical composition, FTIR and thermogravimetric studies. The material shows a capacity of 0.68 meq g(-1) (for K+) which can be retained up to 200 degrees C. pH titration data reveal its monofunctional behavior. The distribution coefficient values of metal ions have been determined in various solvent systems. A number of important and analytically difficult quantitative separations of metal ions have been achieved using columns packed with this exchanger. In order to demonstrate practical utility of this material, Hg2+ and Pb2+ have been selectively separated and determined in the synthetic mixtures. Assay of Al3+ and Mg2+ in commercial tablets and analysis of lead in the standard reference material have also been attempted.
已在不同混合顺序和水溶液比例下合成了锆(IV)碘钨酸盐样品，其中包括碘酸钾、钨酸钠和氧氯化锆，pH 值为 1。根据化学成分、FTIR 和热重研究提出了一个暂定的公式。该材料显示出 0.68 meq g(-1)（对于 K+）的容量，可保留至 200°C。pH 滴定数据表明其具有单官能行为。已经在各种溶剂系统中确定了金属离子的分配系数值。使用这种交换剂填充的柱子已经实现了多种重要且分析困难的金属离子定量分离。为了证明这种材料的实际用途，已在合成混合物中选择性地分离和测定了 Hg2+和 Pb2+。还尝试了测定商业片剂中的 Al3+和 Mg2+以及分析标准参考物质中的 Pb。
