Brassica oleracea was used for plant availability studies and the material will also be available for quality control purposes. The cabbage, grown on sludge-amended soil, was harvested and processed to a homogeneous powder. The results of a preliminary test on homogeneity and a broad spectrum of element concentrations determined are reported. The soil around the plants was also collected and examined. Estimates of uptake coefficients Ccrop/Csoil are given.