Assessment of Antioxidant and Antimicrobial Property of Polyphenol-Rich Chitosan-Pineapple Peel Film

Table 2

LC-MS-MS quantification of polyphenols in pineapple peel extracts.

Compound	Retention time	Molecular weight	[M-H]^-	Content
	Min		(m/z)	(mg/g dry weight)
				PME	PEE
Gallic acid	2.79	170	169.2	332.01 ± 1.91^c	165.22 ± 4.49^bc
Catechin	3.66	290	289.1	36.98 ± 0.59^a	76.13 ± 1.99^ab
Epicatechin	4.20	290	289.2	42.42 ± 1.63^a	51.95 ± 2.61^a
Ferulic acid	5.25	194	193.3	4178 ± 28.85^e	3477.6 ± 56.85^e
Quercetin	6.39	302	301.1	251.84 ± 3.99^b	228.12 ± 1.88^a
Kaempferol	6.92	286	285.3	413.26 ± 10.49^d	386.74 ± 7.29^d

All values are expressed as mg/g means ± standard deviation (n = 3). Alphabetic letters indicate the significant difference within a column using a one-way analysis of variance (ANOVA).