Table 2. The contents of naringin and narigenin of the hydrolyzed naringin by three commercial enzymes
(unit: ppm)

Enzyme	Hydrolyzed naringin
	pH 4.0				pH 5.0				pH 6.0
	2 h		24 h		2 h		24 h		2 h		24 h
	Naringin	Narigenin	Naringin	Narigenin	Naringin	Narigenin	Naringin	Narigenin	Naringin	Narigenin	Naringin	Narigenin
Viscozyme L	0.06±0.00^c1)	2.93±0.03^a	0.06±0.00^b	2.95±0.01^a	0.36±0.01^c	3.44±0.07^a	0.07±0.00^b	2.95±0.00^c	0.32±0.00^c	2.79±0.00^a	0.05±0.00^b	2.90±0.02^b
AMG 300L	5.11±0.09^b	1.31±0.05^b	1.88±0.01^a	2.30±0.00^c	6.63±0.01^b	1.28±0.07^b	0.07±0.01^b	3.66±0.00^a	4.18±0.01^b	1.60±0.01^b	0.06±0.00^b	2.94±0.03^a
Pectinex Ultra Pulp	6.85±0.02^a	0.73±0.05^c	0.07±0.00^b	2.78±0.00^b	8.68±0.04^a	0.63±0.05^c	0.26±0.00^a	3.44±0.00^b	7.56±0.02^a	0.50±0.05^c	0.54±0.01^a	2.77±0.03^a

^a-cMeans within the same column with different superscript letters are significant different by Duncan’s multiple range test at p<0.05 (n=3).