Table 3 shows the mean values of pH, TTA, TSS and TSS/TTA ratio of umbu-caja diet jams stored under ambient conditions. Freitas et al. (2008) reported an ideal pH range for fruit jams between 3.0 and 3.2, and found that pH values at time zero were within this range (from 3.03 to 3.15), a finding similar to that observed by Pinedo et al. (2013), who analyzed soursop jam (pH = 3.19).