The Determination of Sodium Oxide in Glass by Use of Zinc Uranyl Acetate

JSGT 1947 V31 T228-T244

A detailed investigation of the use of zinc uranyl acetate for determining sodium oxide (as introduced in 1928 by H. H. Barber & I. M.Kolthoff) with the object of applying it both as a rapid and as a precision method to sodium oxide in glasses. Barium, phosphorus (phosphate) and lithium interfere, and arsenate and antimonate may interfere, and all should usually be removed from the solution. Reagent concentrations are stated for which no interference is caused by arsenic, antimony, tin, titanium, zirconium and beryllium, or by small amounts of sulphate or chloride. Interference was not found to be caused by the oxides of Pb, Cu, Cd, Fe, Al, Cr, Zn, Mn, Ni, Co, Ca, Sr, Mg, K, Rb, Cs. The effect of time, temperature and solubility of the precipitate were ascertained. Aprocedure for the application of the method to glass analysis is finally set out.

J. T. Jones