An Antioxidant and Intelligent pH-Sensitive Composite Film Based on Gelatin and Persian Gum Using Purple Carrot Extract

Table 3

Color difference’s () of active Persian gum-gelatin film with 45% purple carrot extract in different pHs against color at pH 2.

pH	L	a	b
2	^a	^a	^a	—
3	^a	^b	^b	6/403^a
4	^b	^c	^b	8/602^b
5	^c	^d	^b	10/817^c
6	^d	^e	^b	17/146^d
7	^e	^e	^c	3/742^e
8	^f	^f	^d	15/330^f
9	^f	^g	^g	2/844^g
10	^d	^h	^g	12/043^h
11	^g	^h	^g	10/054^i
12	^h	^h	^h	3/169^j

Different letters in each column indicate significant differences ().