93: UK); J. Matousek (1985-93; Czechoslovakia); H. J. Matzke (1987-93; Germany); R. W. Ohse (1985-87; Germany); G.-M. Rosenblatt (1985-91; USA); T. Saito (1989-93; Japan)

Abstract

Republication or reproduction of this report or its storage and/or dissemination by electronic means is permitted without the need for formal IUPAC permission on condition that an acknowledgement, with full reference to the source along with use of the copyright symbol 0, the name IUPAC and the year of publication are prominently visible. Publication of a translation into another language is subject to the additional condition of prior approval from the relevant IUPAC National Adhering Organization. Quantitative analysis of a PbO-Si02 glass by electron microprobe (Technical Report) Synopsis: A standard glass sample denoted by the National Institute of Standards and Technology as K-456 was analyzed by an international collaborative team. The results of quantitative determinations of the two oxide glass components, PbO and SOz, are compared and the deviations from the standard values are calculated. Methods of preparation, conditions of quantitative determination and procedures used for the evaluation of the results are also summarized. INTRODUCTION Quantitative determination of the composition of lead glasses by means of electron probe microanalysis (EPMA) appears to be relatively difficult especially if they contain a large amount of Pb. In addition to the uncertainities caused by specimen preparation and by the choice of parameters of the measurements, the selection of standards and the correction methods used for the evaluation of the results have considerable influence. A glass sample consisting of PbO and SiO, was chosen to compare and verify procedures used in a number of laboratories dealing with analysis of glasses by means of electron microprobe. This study follows the paper describing results of electron probe microanalysis of a multicomponent glass obtained by an international collaborative team and phlished previously [I]