Comparison on the properties of fruit powder of different guava cultivars

In order to improve the quality of guava fruit powder,fruit powder was made by spray drying technology.The yield,color,nutrient composition,rheological property and antioxidant activity of different fruit powders were compared.The red-fleshed guava fruit powder had a higher yield( 6.44%) and lower water content( 1.14%). While Zhenzhutao guava fruit powder had a lower yield and higher water content,2.99% and 3.34%. Red- fleshed Sijitao guava fruit powder were 44.25° and 203.3 s,respectively.Red-fleshed Sijitao guava fruit powder had a higher content of total flavonoids( 57.15 mg / g),and Zhenzhutao guava fruit powder had a higher VCcontent( 1.91 mg / g).Both of the results of FRAP and DPPH showed the red- flesh fruit powder sample had a higher antioxidant activity( 3.37,7.11 μmol /100 g),followed by Zhenzhu sample( 2.03,4.57 μmol /100 g),and white- fleshed sample( 1.56,3.33 μmol /100 g). This study showed that the red-fleshed guava fruit powder showed a higher content of flavonoids and higher antioxidant activity,and it could make higher quality of fruit powder.