The changes of chemical property studies showed the decreasing trend in titratable acidity of passion
fruit juice. Normal fruit and fruit with fewer wrinkles had higher titratable acidity than fruit with half and full wrinkle.
Besides, potassium content was also found higher amount in normal fruit than those of fruit with wrinkle
incidences. However, unchanged contents were found in total soluble solids and vitamin C during passion fruit
senescence. On the other hand, TSS/TA ratio showed significant increase during the wrinkle development and
reached the highest ratio in fruit with full wrinkle (Table 1).