Saha, M R and Das, S N and Dasgupta, S (1987) Direct complexometric determination of aluminium in presence of high iron and high titanium. Transactions of the Indian Ceramic Society, 46 (6). pp. 162-165. ISSN 0371-750X

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Abstract

Usually, complexometric determination of aluminium in solution involves a back titration procedure using zinc acetate and EDTA at pH 5.3. Iron and titanium, when present in large amounts, interfere due to intense yellow colour of Fe(III)-EDTA complex and slow hydrolysis of TiO-EDTA complex. A method has been developed where alumina has been directly determined via indirect titration with EDTA overcoming the interfering effects of iron and titanium. An excess of EDTA is added, the solution is brought to pH 5–6 and boiled. NaOH solution is then added to bring the pH of the alkaline solution to 11–11.5, when iron and titanium complexes break down, producing the respective hydroxides. The solution is then made to a definite volume along with the hydroxide precipitates. An aliquot of the filtered solution is analysed for alumina following the usual back titration procedure with EDTA. Synthetic solutions of alumina containing large amounts of iron and titanium, as well as iron and titanium bearing materials were analysed for alumina. The results obtained showed excellent precision and accuracy compared to those by other standard methods.

Item Type:	Article
Subjects:	Microstructure and Characterization
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	13 Apr 2015 06:42
Last Modified:	05 Mar 2016 13:31
URI:	http://cgcri.csircentral.net/id/eprint/2822

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