Browning Behavior of Calcium Maltobionate-water System

Area of Science:

• Food Chemistry
• Physical Chemistry

Background:

• Browning reactions are critical in food processing and storage.
• Understanding calcium maltobionate (CaMb) degradation is essential for product stability.

Purpose of the Study:

• To elucidate the browning behavior of calcium maltobionate (CaMb) under varying conditions.
• To establish a predictive model for CaMb browning during thermal condensation.

Main Methods:

• Preparation of CaMb samples with controlled water content (0-50%) and water activity (0-0.98).
• Measurement of browning absorbance over time at temperatures ranging from 353-413 K.
• Kinetic analysis using pseudo-zero-order reaction models and Arrhenius equation.

Main Results:

• CaMb browning rate followed pseudo-zero-order kinetics and increased linearly with holding time.
• Temperature dependence of the browning rate was described by the Arrhenius equation, yielding pre-exponential factors and activation energies.
• Water content and activity exhibited complex effects on browning rate at ambient temperature, attributed to monolayer, plasticizing, and dilution effects.
• A linear relationship between the pre-exponential factor and activation energy was observed, consistent with the thermodynamic compensation rule.

Conclusions:

• A comprehensive understanding of CaMb browning kinetics was achieved.
• The study established a predictive approach for CaMb browning during thermal condensation, considering water content and temperature.
• The findings provide valuable insights for controlling CaMb stability in food and pharmaceutical applications.