In freeze concentration operations the fluids remain at temperatures below 0 C. For a good study of this
concentration operation is very important to know the values of freezing point. The aim of this work was
to establish a model that predicts the freezing point of fruit juices at various concentrations within the
range of interest for freeze concentration (10–40 Brix). The model proposed relates the freezing point
of a juice with the concentrations of main sugars present in the juice: sucrose, glucose and fructose.
The freezing point of apple juice, pear juice and peach juice was determined experimentally at various
concentrations, and experimental results were well correlated with model calculations.