摘要
研究了2-(3,5-二氯-2-吡啶偶氮)-5-二甲氨基苯胺(3,5-diCl-PADMA)光度法测定铂(Ⅳ)的最佳条件.结果表明,在pH3.25~5.25的HAc-NaAc缓冲介质中,铂与试剂在沸水浴中加热25min后能形成稳定的蓝色配合物,加入无机酸及乙醇后转变为绿蓝色,其最大吸收波长位于634nm,表观摩尔吸光系数高达1.04×105L·mol-1·cm-1.以EDTA为掩蔽剂,较大量的常见金属离子不干扰测定.铂含量在0~12μg/10mL范围内符合比尔定律.方法已应用于催化剂中微量铂(Ⅳ)的测定.
Al 7+ 13 keggin ion pillared layered lanthanum titanate is synthesized by a stepwise exchange method. Through hot treatment in the air for the complexes, alumina pillared layered lanthanum titanate is obtained. The influence of the synthetic condition on the interlayer spacing and thermal stability and surface area of the material is studied by ICP, XRD, surface area and pore size determination.
出处
《陕西师范大学学报(自然科学版)》
CAS
CSCD
北大核心
1997年第3期55-57,共3页
Journal of Shaanxi Normal University:Natural Science Edition
基金
陕西省自然科学基金
关键词
铂
分光光度法
显色反应
PADMA
Al 13 O 4(OH) 24 (H 2O) 12 ] 7+ keggin ions
alumina pillared layered lanthanum titanate
synthetic condition