The Estimation of Selenium in Glass JSGT_V07_T303-T309
In the course of a detailed study of the use of selenium as a decolorising agent in glass, it was found desirable to estimate, if possible, the amount of selenium actually remaining in the glass. Although there are many good methods for the estimation of selenium when it occurs in the free state or in the form of its more common compounds, one method only has been described, and that but in outline, for the estimation of small amounts of selenium occurring in glass. It is the method worked out by Frankel and was employed for the determination of the element in ruby glass, in which it actually remained to the extent of 0·02%, or about ten times the proportion actually used for decolorising purposes.
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