Abstract
The Grimm glow discharge lamp (GDL) is used for the direct spectrochemical determination of the major and minor elements in solid geological materials and related non-conducting matrices that vary widely in mineralogical, chemical and textural properties. A study of the sputtered surfaces using a scanning electron microscope indicates that material transport is non-thermal. As a result, glow discharge lamp (GDL-AES) atomic emission spectrometry is essentially free from the influence of the physical and chemical composition of the sample. As a consequence, major and minor elements can be determined with accuracy and precision, thus substantiating the validity of Grimm GDL-AES for the analysis of non-conducting materials.
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