The spectrographic analysis of opal-type glasses

JSGT 1958 V42 T240-T247

A method is described for the spectrographic analysis of Fe₂O₃, Al₂O₃, Cr₂O₃, Mn₃O₄, ZnO, CaO, BaO, and MgO in opal-type glasses. The ground sample is mixed with carbon powder containing suitable internal standards, and silver oxide is added as spectrographic buffer. The cathode layer arc is employed in the analysis. Details are given of the preliminary experimental work which includes the following: (1) the most appropriate spectrographic buffer and internal standards; (2) the types of electrodes; (3) choice of standard samples; (4) suitable line pairs. A series of results is compared with those obtained chemically.

W. Ward