Table 5 show acidity content of the fresh-cut melon and papaya that measured using titratable acidity and
also pH. We can find in this table that acidity content was slowly increase during storage under different
temperature storage conditions and also decrease in pH during measurement until shelf-life products was occurred.
Acidity is main indicator to know shelf-life fresh-cut products using visual detection. During ripening procese,
organic acid content will decrease and soluble solid content or sucrose will increase, but acidity content will increase
at the end of the shelf-life of the fresh product as indicator for consumer that fresh-cut product was not acceptable to
be eaten [7]. Based on acidity data, we find that shelf-life of fresh-cut melon is 4 days and fresh-cut papaya 3 days.