QUALITY CONTROL MATERIALS FOR ANALYSIS OF VITAMINS IN FOOD

One of priorities in research undertaken to support Food Composition Analysis was the production of a range of reference materials relevant to determine nutrients in selected foods. This paper describes the implementation and outcomes of activities on reference material production program and their contribution to international developments in the harmonization of Quality System of Food Composition Databanks In order to enhance the quality assurance of analytical result. Infant formula as food matrix was evaluated to check for the suitability as quality control matrices for the analysis vitamin B2 and vitamin E. Homogeneity and stability of samples was evaluated by means of official methods of analysis. Statistical analysis was carried out to check for significant differences between results. Results showed that both nutrients were homogeneous for all selected parameters. Regarding stability, the infant formula under study can be used in-house quality control materials at different temperatures and for different periods of time. The results have demonstrated that quality control materials prepared under the frame of ISO 34 and ISO 17025 standards can fit the purpose of measurement process of nutrient values that enter in food composition database.