Determination of Boron in Magnesite and Fused Magnesia

Abstract

Potential measurements in the vicinity of the stoichiometric point yielded an oxidation potential at the end point of 1173 =*= 20 mv., referred to the normal hydrogen electrode.The siloxene indicator, to function properly, must be used in acid solution.Methods described may be applicable to many determinations involving the presence of a highly colored or opaque component.

Ferrous Metallurgy

“…Boron. Boron in magnesite and fused magnesia may be determined by a method devised by Hazel and Ogilvie (37), entailing solution of the sample in hydrochloric acid under a reflux condenser, followed by precipitation of impurities with sodium carbonate and sodium hydroxide. Boron is titrated in the purifica!…”