新显色剂羧基三氮唑偶氮氯膦的合成及其与镧(Ⅲ)的显色反应  

Synthesis of carboxy-triazolylazo-chlorophosphonazo and its color reaction with lanthanum (Ⅲ)

作　　者：王婷[1] 葛昌华[1] 贾耐静 陈峰[1] 张泉[1] 李呈宏[1] 

机构地区：[1]台州学院医药化工学院,浙江台州318000

出　　处：《冶金分析》2015年第2期23-26,共4页Metallurgical Analysis

摘　　要：研究了新显色剂羧基三氮唑偶氮氯膦（简称CTACPA）的合成及其与镧㈣的显色反应。在pH 4．0的HAc-NaAc缓冲介质中，CTACPA与镧㈣形成稳定的紫红色配合物，其最大吸收波长为645nm，表观摩尔吸光系数为3．79×10^4 L·mol^1·cm^1，镧㈣质量浓度在0．08～0．8／μg／mL范围内符合比尔定律，一些镧系稀土离子对测定结果没有干扰。方法可不经分离直接测定Pt-La／CNTs和Pt-La／ZrO2催化剂样品中微量镧，测定值与原子吸收光谱法（AAS）测定值相符。The synthesis of a new reagent carboxy-triazoleylazo-chlorophosphonazo(CTACPA)and its color reaction with La(Ⅲ) were studied.It was found that the reagent reacted with La? to form a stabe purple complex in the medium of HAc-NaAc at pH 4.0.The maximum absorption wavelength appeared at 645 nm.The apparent molar absorptivity was 3.79×104 L·mol-1·cm-1.Beer's law was obeyed in the range of 0.08-0.8μg/mL for La(Ⅲ).Some rare earth ions in lanthanide series did not interfere in the determination.The method has been used for the direct determination of micro lanthanum in Pt-La/CNTs and Pt-La/ZrO2 catalyst samples without separation.The results were in good agreement with the values obtained by atomic absorption spectrometry(AAS).

关 键 词：羧基三氮唑偶氮氯膦 合成 光度法 镧(Ⅲ) 

分 类 号：O626[理学—有机化学] O652.3[理学—化学]