混合表面活性剂存在下水杨基荧光酮分光光度法测定微量铌  

Determination of Trace Niobium Using Salicylfluorone in Presence of Mixed Surfactants by Spectrophotometry

作　　者：于秀兰 郝登越 YU Xiulan;HAO Dengyue(College of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang llO142,China)

机构地区：[1]沈阳化工大学应用化学学院,辽宁沈阳110142

出　　处：《湿法冶金》2018年第3期251-254,共4页Hydrometallurgy of China

摘　　要：研究了用十六烷基三甲基溴化铵(CTMAB)-阿拉伯树胶(AG)-水杨基荧光酮(SAF)显色体系测定微量Nb^(5+)。结果表明:在加入CTMAB和AG的5mol/L盐酸介质中,Nb^(5+)与水杨基荧光酮可形成最大吸收波长为520nm的橘红色配合物,配合物的表观摩尔吸光系数为1.38×10~5 L·mol^(-1)·cm^(-1),Nb^(5+)质量浓度在0~0.48μg/mL范围内符合比尔定律。Chromogenic system（niobium（Nb5＋）-hexadecyltrimethylammonium bromide（CTMAB）-arabic gum（AG）-salicylfluorone（SAF））for determining trace niobium was developed.The results show that in the presence of CTMAB and AG in the medium of 5 mol/L chloride acid,Nb5＋ reacts with SAF to give a orange-red complex whose the maximum adsorption wavelength is at 520 nm,and the apparent molar absorptivity is 1.38×105 L·mol-1·cm-1.Beer′s law is obeyed in the range of 0-0.48μg/mL for Nb5＋ mass concentrate.

关 键 词：表面活性剂 水杨基荧光酮 铌 分光光度法 测定 

分 类 号：O657.3[理学—分析化学]