Abstract

The inductively coupled plasma in combination with a direct reading spectrometer has been used for the simultaneous determination of metals in oil to the sub ppM level. The instrument analysis time of about 1 minute per sample plus an efficient sample preparation scheme give the rapid results needed for the analysis of used oils for wear metals, for the characterization of crudes and feedstocks, and for monitoring of developmental processes. Instrument parameters and a simplified sample preparation technique are discussed. The few interelement interferences encountered are computer corrected, and the effects of a detergent and of an easily ionized element are found to be negligble. 6 tables, 2 figures.

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