Silicate rock analysis by energy-dispersive X-ray fluorescence using a cobalt anode X-ray tube. Part 2. Practical application and routine performance in the determination of chromium, vanadium and barium

Abstract

This paper investigates the practical determination of the elements Cr, V and Ba by energy dispersive X-ray fluorescence using the excitation conditions described in Part 1. Particular attention was paid to the selection of a reliable set of geochemical reference materials to form a coherent calibration set. Discrepancies caused by the overlap of calcium-aluminium and calcium-silicon sum peaks on Ba L and Cr K lines in those samples containing more than 10% CaO were eliminated by reducing spectrum data accumulation rates. New data are presented for the elements Cr, V and Ba (and Ti and Mn) in nine reference materials recently distributed by the Geological Survey of Japan and these results show satisfactory agreement with other published values.