Sequential multi-element analysis of small fragments of glass by atomic-emission spectrometry using an inductively coupled radiofrequency argon plasma source

Abstract

A method is described for the quantitative multi-element analysis of small fragments (200–500 µg) of glass using an inductively coupled radiofrequency argon plasma source. The glass samples are digested with a mixture of hydrofluoric and hydrochloric acids and chromium is added as an internal standard. An ultrasonic nebuliser is used in order to reduce to a minimum the volume of solution required for each analysis. A single monochromator and detection system is employed, and the wavelength regions of interest are examined sequentially by means of a specially constructed control unit. The results for aluminium, barium, iron, magnesium and manganese show that the analysis of glass fragments in the range 200–500 µg can be achieved with coefficients of variation of approximately 10%. Standard glasses were analysed to assess the accuracy of the method.