Vol. 8, Issue 11, Part N (2024)

This study investigates the moisture sorption isotherms of Bael powder at varying relative humidity (RH) levels (20%, 50%, 75%, and 95%) and temperatures (25 °C, 30 °C, and 35 °C). Equilibrium moisture content (EMC) was determined using the gravimetric static method, and the resulting data were fitted to four isotherm models: Anderson, Guggenheim–Anderson–de Boer (GAB), Oswin, and Brunauer-Emmett-Teller (BET). The accuracy of the models was evaluated using the coefficient of determination (R²) and reduced chi-sqr (χ2). It was found that GAB model fits best describing equilibrium moisture content and water activity (EMC–a_w) relationships for Bael powder. The study provides insights into the hygroscopic nature of Bael powder, essential for optimizing its storage conditions and extending its shelf life.