A sample fusion technique for whole rock analysis with the electron microprobe

Details A sample fusion technique for whole rock analysis with the electron microprobe A sample fusion technique for whole rock analysis with the electron microprobe

Mar 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977gecoa..41..435b&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 41, Issue 3, pp.435-438

Computer Science

7

Scientific paper

A technique has been devised for major element whole rock analysis using the electron microprobe. Rock powders are fused on a strip heater using a low voltage, high amperage source and quenched to form a glass bead in a container pressurized with argon. Sample weights of 20 mg to ~ 300 g with run times of 20-60 sec produce sufficient material for analysis. Analyses of the fused samples compare favorably with those achieved by X-ray fluorescence and neutron activation for major elements in a wide range of silicate rock compositions. Analytical errors for major element concentrations are generally 5% or less. Alkali losses for Rb are ~10% at the 20 ppm level as determined by isotope dilution mass spectrometry. Sodium determinations compare favorably with those obtained by neutron activation analysis.

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