Abstract: The simplified state diagram of colostral whey powder with additives was constructed by determining the freezing curve (initial freezing point versus solids content), the glass line (glass transition temperature versus solids content), and maximalfreezeconcentration conditions (end point of freezing, T′m, and glass transition temperature of maximallyfreezeconcentrated solution, T′g) using differential scanning calorimetry (DSC). The Chen and GordonTaylor equations were employed for nonlinearly modelling the freezing curve and the glass line, respectively. The results show that the Chen and GordonTaylor equations can well fit the freezing curve and the glass line of colostral whey powder with additives, respectively. The conditions of maximallyfreezeconcentrated solution are 23724 K (T′m) and 22624 K (T′g), respectively. The state diagram of colostral whey powder with additives is a helpful tool for choosing the optimal dehydration process parameters of colostral whey with additives and storage conditions for colostral whey powder with additives.

Key words: state diagram, colostral whey powder, glass transition temperature, maximalfreezeconcentration conditions, differential scanning calorimetry (DSC)