Table 3. Changes in pH of grapes during the storage of phytoncide treatment derived from pine bark

Storage period (day)	Control	Sulfur dioxide Pad	Phytoncide pad 1	Phytoncide pad 2
0	3.47±0.04^e¹⁾	3.52±0.05^e	3.70±0.07^e	3.67±0.05^d
3	3.87±0.17^d	3.86±0.10^d	4.05±0.13^d	4.09±0.17^c
6	4.02±0.01^c	4.04±0.01^c	4.22±0.03^c	4.18±0.01^c
9	4.23±0.01^b	4.08±0.01^b	4.29±0.01^b	4.30±0.01^b
12	4.36±0.01^a	4.27±0.01^a	4.39±0.01^a	4.45±0.01^a

¹⁾^a^-^cMeans within column with different superscripts are significantly different (p<0.05).