Factors affecting the determination of molybdenum and vanadium in aqua regia digests of soil by graphite furnace atomic absorption spectrometry

Abstract

Molybdenum and vanadium were determined in aqua regia digests of soils without extraction prior to their measurement. Satisfactory accuracy and precision were obtained for both elements. Molybdenum was determined using only acidified calibration standards. Serious interference effects on the vanadium analytical signal caused by concomitant species were effectively eliminated using the addition of palladium as a chemical modifier and the standard additions method.