The determination of trace amounts of chromium by stable isotope dilution-mass spectrometry

Abstract

A simple chemical-mass-spectrometric method for the determination of chromium is described. The method has been applied to steels, copper-base and aluminium-base alloys. The conditions for the thermal ionisation of chromium are given, and the stable isotope-dilution technique is used for quantitative analysis over the range 0·003 to 0·2 per cent. The advantage of the isotope-dilution technique in not requiring quantitative extraction is clearly illustrated by the application of a single method to more than one type of alloy.