摘要
本文研究了对乙酰基偶氦氯膦与钛的显色反应，结果表明，在ｐＨ３．６至０．５ｍｏｌ／Ｌ的盐酸酸度范围内，钛与试剂形成组成比为１∶２的蓝色配合物，最大吸收波长为６８５ｎｍ，表观摩尔吸光系数为１．７６×１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），钛浓度在０～２５μｇ／２５ｍＬ范围内符合比耳定律。多数金属元素不干扰测定，在掩蔽剂存在下，可测定镁砂和铝矾土中二氧化钛。
The colour reaction of titanium with p-acetylchlorophosphonazo(CPApA) has been investi-gated.It is shown that in dilute HCl medium , titaniumcan form a blue complex with CPApA and the compo-sition ratio of titanium to CPApA has been found tobe 1∶2. The maximum absorption of the complex isat 685nm and the apparent molar absorptivity is 1. 76×10￣4L·mol￣(-1)·cm￣(-1). Beer's law is obeyed in therange of 0～25μg/25mL.The interference and its e-limination are studied. The method can be used for thedetermination of titanium in magnesium sand and alu-mina with satisfactory results.
出处
《分析试验室》
CAS
CSCD
北大核心
1994年第2期54-55,共2页
Chinese Journal of Analysis Laboratory
关键词
钛
对乙酰基
偶氮氯膦
镁砂
铝矾土
Spectrophotometry
p-acetylchloro-phosphonazo
titanium determination
magnesiumsand
alumina
