摘要
系统研究邻硝基苯基荧光酮与钛的显色反应，试验多种表面活性剂对体系的作用及相应的光度性质，从而确定Ｔｉ（Ⅳ）－ＯＮＰＦ－Ｔｗｅｅｎ－４０为较佳体系，在０．０８４—０．１５ｍｏｌ／ＬＨＣｌ介质中形成紫红色配合物，其波长在５３０ｎｍ处的表观摩尔吸光系数ε为１．７９×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，配合物组成中Ｔｉ∶ＯＮＰＦ＝１∶４，钛浓度在０—１．２μｇ／１０ｍＬ范围内服从比耳定律。应用于直接测定硅铁合金中钛，结果满意。
The colour reactions of titanium with ONPF were investigated.The effects of surfactants on the colour reaction systems and their spectrophotometric property have been tested.Ti(Ⅳ) ONPF Tween 40 system is better than others.Ti(Ⅳ) ONPF Tween 40 forma purplish red complex in the medium of 0.084-0.15mol/L HCl,its apparent molar absorptivity is 1.79×10 5L·mol -1 ·cm -1 at 530nm.The complexation ratio is Ti∶ONPF=1∶4.Beer′s law is obeyed in the range of 0-1.2 μg/10mL for Ti.It has been applied to the direct determination of trace Ti in ferro silicon with satisfactory results.
出处
《光谱实验室》
CAS
CSCD
1998年第5期105-108,共4页
Chinese Journal of Spectroscopy Laboratory
关键词
钛
邻硝基苯基荧光酮
吐温-40
光度法
硅铁合金
测定
分析
Titanium,[2,3,7 Trihydroxy 9 (o Nitrophenyl)Fluorone (ONPF)],Tween 40,Spectrophotometry,Ferro Silicon.
