. 2021 Sep;59(3):282–294. doi: 10.17113/ftb.59.03.21.6759

Table 5. Changes in total phenolic content and antioxidant activity determined by DPPH and FRAP occurring during 6 months of storage of apple, chokeberry and beetroot pomace liqueurs at two different temperatures.

Temperature/°C	t/month		AL					CL				ACL			ABL
Temperature/°C	t/month		ɣ(TPC as GAE)/(mg/L)	c(DPPH)/(mmol/L)		c(FRAP)/(mmol/L)		ɣ(TPC as GAE)/(mg/L)	c(DPPH)/(mmol/L)		c(FRAP)/(mmol/L)	ɣ(TPC as GAE)/(mg/L)	c(DPPH)/(mmol/L)	c(FRAP)/(mmol/L)	ɣ(TPC as GAE)/(mg/L)			c(DPPH)/(mmol/L)	c(FRAP)/(mmol/L)
no storage			(871±32)^f	(3.1±0.0)^h	(8.1±0.1)^h		(3473±33)ⁱ			(28.0±0.7)^h	(58.9±0.5)ⁱ	(2960±35)^h	(16.2±0.3)^h	(29.5±1.3)^e		(790±8)^g	(2.3±0.2)^f		(9.6±0.4)^g
4		1	(646±24)^e	(2.8±0.0)^fg	(8.5±0.1)^h		(3205±42)^g			(21.9±0.4)^g	(51.5±1.3)^g	(2177±54)^g	(12.9±0.39)^g	(31.6±0.4)^f		(524±18)^f	(1.9±0.0)^e		(5.8±0.1)^e
		2	(645±9)^e	(2.6±0.1)^f	(7.7±0.3)^g		(3218±21)^g			(19.3±0.6)^f	(47.9±0.4)^f	(1977±18)^ef	(11.34±0.2)^d	(28.4±1.3)^de		(482±4)^e	(1.6±0.1)^d		(5.0±0.1)^d
		3	(552±6)^d	(2.0±0.2)^e	(5.4±0.1)^e		(29429±11)^f			(19.6±0.2)^e	(35.1±0.6)^e	(1919±47)^e	(12.7±0.2)^fg	(23.2±0.5)^c		(358±4)^d	(1.2±0.0)^c		(3.6±0.1)^c
		4	(409±3)^c	(1.5±0.1)^d	(4.0±0.1)^d		(2658±26)^e			(16.3±0.7)^b	(27.3±0.2)^b	(1579±18)^c	(8.7±0.8)^c	(17.6±0.1)^b		(321±1)^c	(0.8±0.1)^b		(3.0±0.0)^b
		5	(256±2)^ab	(0.9±0.0)^ab	(2.9±.0.0)^c		(2500±20)^d			(17.6±0.6)^cde	(31.8±0.2)^cd	(840±17)^a	(4.8±0.2)^a	(9.8±0.4)^a		(139.0±2.6)^a	(0.7±0.2)^b		(1.2±0.1)^a
		6	(226±2)^a	(1.2±0.0)^bc	(2.3±0.1)^b		(1729±15)^a			(14.4±0.3)^a	(19.9±0.9)^a	(784±13)^a	(7.9±0.4)^c	(10.3±0.1)^a		(153.1±2.1)^a	(0.6±0.1)^ab		(1.3±0.1)^a
20		1	(640±2)^e	(2.9±0.0)^gh	(7.6±0.1)^g		(3302±33)^h			(23.8±0.5)^h	(54.3±0.7)^h	(2228±58)^g	(11.5±0.2)^d	(28.1±0.8)^de		(527±4)^f	(2.0±0.1)^e		(6.5±0.1)^f
		2	(618±6)^e	(2.2±0.0)^e	(6.6±0.1)^f		(3400±10)ⁱ			(21.9±0.2)^g	(51.8±0.8)^g	(2035±13)^ef	(11.8±0.5)^df	(26.2±1.5)^d		(484±3)^e	(1.6±0.0)^d		(5.0±0.0)^d
		3	(542±2)^d	(2.2±0.1)^e	(3.4±0.1)^d		(2996±26)^f			(21.0±0.5)^de	(33.3±0.8)^de	(1749±33)^de	(11.7±0.3)^df	(16.3±0.3)^b		(317±1)^c	(1.3±0.0)^c		(3.4±0.1)^bc
		4	(424±3)^c	(1.4±0.2)^cd	(3.3±0.5)^d		(2648±29)^e			(18.5±0.5)^c	(30.2±0.2)^c	(1280±52)^b	(6.1±0.1)^b	(16.3±0.6)^b		(332±5)^c	(0.4±0.1)^a		(3.3±0.5)^bc
		5	(255±4)^ab	(0.8±0.1)^ef	(1.3±0.1)^ab		(2034±21)^c			(14.5±0.8)^a	(21.5±0.4)^a	(832±42)^a	(4.8±0.0)^a	(8.2±0.5)^a		(175±4)^b	(0.5±0.0)^ab		(1.3±0.1)^a
		6	(268±6)^b	(0.9±0.0)^a	(1.3±0.1)^a		(1718±71)^a			(14.6±0.2)^a	(21.2±0.9)^a	(874±9)^a	(5.9±0.1)^b	(8.0±0.3)^a		(181±4)^b	(0.5±0.0)^ab		(1.29±0.1)^a
L=liqueur, A=apple, C=chokeberry, B=beetroot; TPC= total phenolic concentration expressed as gallic acid equivalent (GAE) per litre of liqueur. Antioxidant activity (DPPH and FRAP) expressed as Trolox equivalent per litre of liqueur. Values are arithmetic mean±standard deviation. Values marked with the same letter within the same column are not statistically different (α=0.05)