KOMATIITE WITS-1, LOW CONCENTRATION NOBLE-METAL STANDARD FOR THE ANALYSIS OF NON-MINERALIZED SAMPLES

WITS-1 is a sample of silicified komatiite collected from close to the Komati River type section, near Barberton in South Africa. Two thousa nd kg of this komatiite was crushed and prepared for standardization. Noble metal analysis of WITS-1 has been carried out by six laboratorie s using four different analytical methods. The data obtained from thes e sources were subjected to statistical analysis (F ratio and Student t test) and a suite of ''preferred'' values for the noble metal concen trations are reported.