Objective The Water Sorption Isotherm represents the equilibrium relationship between the water content of a food and its water activity (aw). At equilibrium, water activity is, in effect, equivalent to the relative humidity of the atmosphere surrounding the food. Accurate definition of the water sorption isotherm is of considerable importance to processors of food and agricultural products. Particular applications include drying of foods to ensure the required stability, mixing of foods and prediction of the sorption isotherm of the products and, packaging where the freshness of a product such as cheese depends upon the ability of the container to maintain the specified degree of humidity. The water activity subgroup of COST 90 (physical properties of foods) has developed a method for determining sorption isotherms and showed that micro crystalline cellulose (MCC) could serve as a stable and homogeneous reference material. The reference material based on MCC is designed to ensure correct application of the method. RESULTS The original COST 90 method has been further refined in order to improve definition of the MCC oven drying conditions. The water content of the reference material (RM 302) has been certified at 10 water activities and allows the application of the COST 90 method to be checked over the normal range of interest. The project is terminated: EUR report 12 429 (1989). Programme(s) FP2-BCR 4 - Research and development programme (EEC) in the field of applied metrology and chemical analysis (Community Bureau of Reference - BCR), 1988-1992 Topic(s) Data not available Call for proposal Data not available Funding Scheme CSC - Cost-sharing contracts Coordinator BBSRC Institute of Food Research EU contribution No data Address BS Bristol United Kingdom See on map Total cost No data Participants (10) Sort alphabetically Sort by EU Contribution Expand all Collapse all Federal Research Centre for Nutrition Germany EU contribution No data Address Haid-und-Neustr.9 76131 Karlsruhe See on map Links Website Opens in new window Total cost No data Institut National de la Recherche Agronomique (INRA) France EU contribution No data Address Rue de la Géraudière 44026 Nantes See on map Total cost No data LUDWIG-MAXIMILIANS UNIVERSITY OF MUNICH Germany EU contribution No data Address Geschwister-Scholl-Platz 1 80539 MUENCHEN See on map Total cost No data Ministry of Agriculture, Fisheries and Food (MAFF) United Kingdom EU contribution No data Address 135 Abbey Road AB9 8DG Aberdeen See on map Total cost No data South Bank University United Kingdom EU contribution No data Address Borough Road SE1 0AA London See on map Total cost No data Stazione Sperimentale per l'Industria delle Conserve Alimentari Italy EU contribution No data Address Parma See on map Total cost No data Universidad Politecnica ETSIA Spain EU contribution No data Address Valencia See on map Total cost No data Universität Hohenheim Germany EU contribution No data Address 70593 Stuttgart See on map Total cost No data Université de Bourgogne France EU contribution No data Address 21000 Dijon See on map Total cost No data Wageningen Agricultural University Netherlands EU contribution No data Address Wageningen See on map Total cost No data
