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.
出处
《冶金分析》
CAS
CSCD
北大核心
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 )
