Mitra, B and Sinha, B C (1987) A rapid method for accurate determination of boron in glass, enamel and other silicate materials. Transactions of the Indian Ceramic Society, 46 (5). pp. 132-135. ISSN 0371-750X

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Abstract

A simple and rapid method has been worked out for accurate determination of boron in commercial glasses, enamels and other silicate materials by alkalimetric titration of boron as mannitoboric acid. In the method, the error due to the loss of boron during decomposition of a sample at high temperature by fusion with Na2CO3 in existing methods has been eliminated by fusing at low temperature with NaOH. Bromothymol blue has been advantageously used as the indicator at pH 6.5 (pale yellow to bluish green) for neutralization of free acids and titration of mannitoboric acid. The interference of phosphate has been successfully eliminated by precipitating it out as zirconyl monohydrogen phosphate. Fluorine, calcium and magnesium up to 50 mg per 50 ml did not interfere.

Item Type:	Article
Subjects:	Microstructure and Characterization
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	10 Apr 2015 12:39
Last Modified:	05 Mar 2016 13:29
URI:	http://cgcri.csircentral.net/id/eprint/2814

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