University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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Classification: Commercial product -> glass -> bismuth

Citations 1

"Spectrophotometric Determination Of Silicon In Bismuth Borosilicate Glass By Flow Injection"
Anal. Chim. Acta 1992 Volume 262, Issue 2 Pages 243-251
Frances A. Archer, Kenneth W. Street, Jr.*

Abstract: The cited method is based on the formation of heteropoly blue by the reduction of the yellow heteropoly complex β-molybdosilicic acid. Modifications made include removal of Bi interferent in sample preparation and removal of the HF matrix in flow injection. The cited method compared well with standard spectrophotometric and ICAP methods but results were not in agreement with calculated compositions. A spectrophotometric flow injection method for the determination of silicate based on heteropoly blue formation is presented. The proposed reagent gives a wider dynamic range than previously reported flow injection procedures. The Bi interference reported for the spectrophotometric method is eliminated in sample preparation, and the method is applied to the determination of Si in Bi borosilicate glass. Results are compared with spectrophotometric and inductively coupled Ar plasma emission spectrometric determinations
Silicon Sample preparation Spectrophotometry Linear dynamic range Method comparison Interferences