Abstract

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.

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