对乙酰基偶氮氯膦与钛显色反应的研究及镁砂和铝矾土中钛的测定  

The Colour Reaction of Titanium with p-Acetylchlorophosphonazo and Its Application

作　　者：赵书林[1] 王巷珍 辛东雄 

机构地区：[1]沈阳化工学院,沈阳电视大学

出　　处：《分析试验室》1994年第2期54-55,共2页Chinese Journal of Analysis Laboratory

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.

关 键 词：钛 对乙酰基 偶氮氯膦 镁砂 铝矾土 

分 类 号：O614.411[理学—无机化学]