The Determination of Small Quantities of Boric Oxide in Glass
JSGT 1951 V35 T093-T102
The method applies to glasses containing 0·1–5·0 per cent. B2O3. It employs an electrometric titration and gives accurate results. Only a small sample of glass need be used in the analysis, and the manipulations can be carried out in a centrifuge tube, thus eliminating slow filtrations. The method is not subject to interference by other common radicals with the exception of phosphate, which is easily removed by precipitation with a lead salt.
G. R. Ball & E. W. Fajans