CERTIFICATION OF THE MASS FRACTIONS OF CA, CU, CL, I, FE, K, MG, P, PB, N, NA AND ZN IN SKIM MILK POWDER

Analyses of milk and milk products are routinely performed by a number of dairy laboratories to control the quality of these products with r egard to e.g. nutritional components and potential exposure to toxic e lements. In order to improve and control the quality of such analyses the Community Bureau of Reference (BCR) has organized series of certif ication campaigns to produce reference material of milk certified for a variety of elements and compounds. The increasing demand is such tha t the stock of some of these materials is now exhausted. Consequently, the BCR decided to produce a new batch of CRM of skim milk powder cer tified for its contents of Ca, Cu, Cl, I, Fe, K, Mg, P, Pb, N, Na and Zn (CRM 063R). This material was carefully prepared (spray-drying) and its homogeneity and long term stability was verified. This paper pres ents the certification work performed.