4,5-二溴邻硝基苯基荧光酮分光光度法测定合金钢与稀土精矿中微量钛  

Spectrophotometric determination of micro titanium Ⅳ in alloy steel and rare-earths concentrate with 4,5-dibromo-2-nitro-phenylfluorone

作　　者：张莹[1] 敖登高娃[1] 

机构地区：[1]内蒙古大学化学化工学院,内蒙古呼和浩特010021

出　　处：《冶金分析》2004年第3期43-45,共3页Metallurgical Analysis

基　　金：内蒙古自然科学基金资助项目 ( 2 0 0 2 0 80 2 0 114 )

摘　　要：研究了 4,5 二溴邻硝基苯基荧光酮 (DBON PF)与钛的反应条件及应用。在 0 0 0 4～ 0 0 16mol/LH2 SO4 介质中 ,离子表面活性剂十二烷基磺酸钠 (SDS)存在下 ,Ti 与DBON PF生成蓝色三元胶束络合物 ,至少稳定 4h ,最大吸收波长为5 68nm ,表观摩尔吸光系数为 9 5× 10 4 。在 2 5mL溶液中 ,Ti 质量在 0～ 9μg范围内遵守比尔定律。于掩蔽剂存在下 ,可不经分离直接测定稀土精矿及合金钢标准样品中微量钛 。The color reaction between Ti*$ and 4,5-dibromo-2-nitro-phenylfluorone(DBON-PF) has been studied.In 0.004-0.016 mol/L H 2SO 4 medium,Ti*$ reacts with DBON-PF in the presence of SDS to form a blue micelle ternary complex which remains stable at least for 4 h.Its apparent molar absorptivity is 9.5×10 4 L·mol -1·cm -1 at 568 nm. Beer's law is obeyed in the concentration range of 0-9 μg/25 mL for Ti*$. The method has good sensitivity and selectivity. It has been applied to the determination of trace amounts of Ti*$ in alloy steel and rare-earths concentrate in the presence of masking agents with satisfactory results.

关 键 词：二溴邻硝基苯基荧光酮 分光光度法 测定 钛 稀土精矿 合金钢 显色反应 

分 类 号：O657.32[理学—分析化学]