The pH increased from 3.96 to 4.62 in control and to 4.38, 4.29
and 4.27 in S/G, S/G/L and S/G/L/A samples respectively on 20th day.
The pH of S/G/L and S/G/L/A samples remained unchanged from 8th
to 16th day and from 8th to 12th day respectively. Overall, coating
solutions restricted changes in pH of tomatoes. The restricted
increase in pH was paralleled by restricted decrease in titratable
acidity. Such opposite changes has been attributed to the loss of
citric acid in tomatoes by Anthon, Strange, and Barrett (2011).