The conventional optical emission spectrograph is compared with the direct-reading emission spectrometer, and shows that the advantages of the latter instrument are such that it should be considered as a means of obtaining quantitative analyses of a large number of elements in a geochemical program involving rocks, minerals or soil samples.An internal standard analytical procedure involving argon-oxygen atmospheres to surround the arc and a sodium metaphosphate buffer is described for a typical geochemical program. The technique is faster and more quantitative than most conventional spectrographic procedures, although the initial cost of the equipment is high.

First Page Preview

First page PDF preview
You do not currently have access to this article.