Abstract

The effects of irregular slit illumination, polar distribution of elements in the arc plasma, and self-absorption are discussed in relation to the use of the Stallwood jet for D.C. analysis of minor elements in silicates. A general method for simultaneous determination of 19 elements, using a graphite matrix with Pd as internal standard is described. Precision and accuracy are discussed in terms of the standard samples G1 and W1.

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