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General Spectrographic Technique for the Determination of Volatile Trace Elements in Silicates

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Details are given of a quantitative dc-arc method for the determination of up to 15 volatile elements in trace amounts in silicates. Twenty milligrams of sample are mixed with an equal weight of an alumina–lime buffer containing 0.1% bismuth trioxide as internal standard and the mixture arced as the anode in a graphite cup. Careful control of arcing conditions allowed the determination of common volatile elements in amounts down to 1 ppm and in the case of several rare elements—notably Ag, Au, In, and Tl—down to 0.1 ppm.

Document Type: Research Article


Affiliations: Chemistry Division, Department of Scientific and Industrial Research, Wellington, New Zealand

Publication date: September 1, 1967

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