对乙酰基偶氮胂与铝显色反应的研究及应用

Investigation and Application of Colour Reaction of p-acetylarsenazo With Aluminium

研究了对乙酰基偶氮胂与铝显色反应的条件及光度性能．在ｐＨ６．０的醋酸－醋酸钠介质中，对乙酰基偶氮胂与铝形成１：２的蓝色配合物，最大吸收波长为６２０ｎｍ表观摩尔吸光系数达１．３×１０４Ｌｍｏｌ－１·ｃｍ－１，铝量在０～２０μｇ／２５ｍｌ范围内服从比尔定律．应用于硅石中铝量的测定，结果满意．

The conditions and photometric prop￣ of colour reaction of p-aeetylarsenazo with aluthenium are investigated in this paper. In PH6.0 aCetic acid-acehc sodium haiuln, p-acstylarsenazo reactS with aluthenium tO form the blue complex with the raho 1: 2. The maxitheum absorption wavelength is 620urn and the apparent molar photoabsorption coefficient reaches 1.3 × 104 L.mel-1. cm-1. Aluminium amount between 0 ￣ 20 μg/25 ml obeyS Beer' s law. This method can be applied in the detendnation of aluminium in sinica with satisfactory results.