The pH of powders was in the range of 3.63e3.72 (Table 1) and
varied significantly due to drying method used (p 0.05). The
titrable acidity as anhydrous citric acid equivalents in powder
ranged from 6.22 to 7.86 g/100 g db (Table 1). The acidity decreased
in heated samples during drying as compared to lyophilized sample.
The heat might induce Maillard’s reaction involving acid and
proteins resulting in slight decrease in acidity. Statistical analysis
revealed that VD mango powder had significantly lower acidity
values than freeze dried samples.
3.3.1.3. Solubility. Results indicated solubility values of 67e79 g/
100 g db in mango powders due to the presence of sugars and other
soluble matters. Statistical analysis indicated significant change in
solubility with types of drying techniques used (p 0.05). Solubility
of mango powder was observed to be 89.70, 94.38, 95.31 and
90.79 g/100 g in freeze, drum, spray and refractive window dried
samples, respectively (Caparino et al., 2012). The solubility values
observed in the present study were lower than those reported in
the literature previously, which might be due to different ripening
stage and cultivar type since Caparino et al. (2012) used 95e100%
ripe mangoes of ‘Carabo’ cultivar whereas in current study slightly
ripe ‘Tommy Atkin’ mangoes were used.