Table 3.

Mean of three replicates ± standard error. Means in the same column with different lowercase letters are significantly different (Tukey test, α = 0.05).

Wine Sample	Abs 420	Abs 520	420/520
2018	0.545 ± 0.002 a	0.705 ± 0.003 a	0.773 ± 0.001 a
2014	0.499 ± 0.003 b	0.508 ± 0.004 b	0.982 ± 0.001 b
2010	0.702 ± 0.006 c	0.631 ± 0.006 c	1.111 ± 0.001 c
2018—heat test (60 °C)	0.554 ± 0.002 a	0.664 ± 0.003 d	0.834 ± 0.002 a
2018—hydrogen peroxide test	0.435 ± 0.006 e	0.318 ± 0.007 f	1.365 ± 0.013 d
2018—laccase test	0.620 ± 0.02 d	0.770 ± 0.025 e	0.806 ± 0.002 a,b