Changes of quality properties of mango pulp during solar-assisted heat pump drying process

Taking fresh mango as the raw material, the changes of quality properties of water, vitamin C, reducing sugar, protein, color difference, tenderness during solar-assisted heat pump process were explored. The results showed that the optimal drying time was 16 h. The content of moisture, vitamin C, reducing sugar, protein decreased, color difference increased and the tenderness of pulp increased substantially after the first decline with prolonged time during drying. Under the drying time of 16 h, the content of moisture, vitamin C, reducing sugar, protein, color difference and shear force values in obtained sample were 9.26%, 11.36mg/g, 8.12g/100 g, 0.41g/100 g, 2.82, 28.68 N, respectively.