The application of the flame photometer and the spectrograph to the analysis of a soda–lime glass

JSGT 1959 V43 T073-T085

The determination of alkalis and calcium in glass by flame photometry and of calcium, aluminium, and magnesium by spectrography has been investigated. Two flame photometers were used: an Evans Electro selenium Ltd. filter photometer and a flame spectrometer. The determination of soda and potash has been investigated with both instruments and accuracy sufficient for control purposes has been achieved. Calcium has been determined on the flame spectrometer but not on the filter instrument. The determination of calcium, magnesium, and aluminium by a spectrographic porous cup technique has been studied and the results obtained for magnesium showed good agreement with chemical figures. The results for calcium and aluminium were lower than chemical figures. Some preliminary investigation has been carried out into the use of solid samples for the spectrograph.

R. J. Powell & Janet Todd