THE PREPARATION OF A CABBAGE CANDIDATE REFERENCE MATERIAL TO BE CERTIFIED FOR RESIDUES OF AGROCHEMICALS

A new cabbage candidate reference material has been prepared for the determination of residues of agrochemicals. The cabbage was grown with deliberate application of a series of pesticide and herbicide mixtures. After harvest it underwent extensive processing to yield the candidate reference material. In particular the collection of base material, its transformation into powder, the production control and final homogeneity assessment are described. The original bottled material is ready for an intercomparison study during 1992/1993 to establish recommended values for the organic constituents and information values for inorganic constituents.