Table 1.

Variation of free fatty acid, peroxide value, K232 and K270 in Arbequina variety EVOO, subjected to different temperature and light condition during 12 months of storage.

	Free Fatty Acid (% m/m Oleic Acid)							K232 (Absorbance Units)
Month	C1	C2	C3	C4	C5	p-Value	Month	C1	C2	C3	C4	C5	p-Value
0	0.17 ± 0.00	0.17 ± 0.00	0.17 ± 0.00	0.17 ± 0.00	0.17 ± 0.00	-	0	1.55 ± 0.01	1.55 ± 0.01	1.55 ± 0.01	1.55 ± 0.01	1.55 ± 0.01	-
2	-	0.19 ± 0.01 ab	0.18 ± 0.00 a	0.19 ± 0.00 ab	0.20 ± 0.00 b	*	2	-	1.69 ± 0.08 ab	1.66 ± 0.02 a	1.84 ± 0.02 bc	1.88 ± 0.09 c	*
3	-	0.19 ± 0.00 a	-	0.21 ± 0.00 b	0.22 ± 0.01 b	*	3	-	1.72 ± 0.04 a	1.85 ± 0.07 ab	1.90 ± 0.07 ab	1.94 ± 0.10 b	*
4	0.17 ± 0.01 a	0.16 ± 0.01 a	0.17 ± 0.01 a	0.18 ± 0.01 a	0.21 ± 0.01 b	**	4	1.76 ± 0.08 a	1.81 ± 0.11 ab	1.99 ± 0.03 b	1.95 ± 0.02 ab	1.88 ± 0.09 ab	*
5	-	0.19 ± 0.01 a	0.18 ± 0.01 a	0.19 ± 0.01 a	0.20 ± 0.00 b	*	5	-	1.83 ± 0.07 a	1.93 ± 0.07 a	1.92 ± 0.01 a		+
6	-	0.17 ± 0.00 a	0.17 ± 0.01 a	0.18 ± 0.01 b	0.21 ± 0.01 c	**	6	-	1.84 ± 0.00 a	2.05 ± 0.01 a	1.95 ± 0.23 a		+
7	0.18 ± 0.01 a	0.19 ± 0.01 ab	0.20 ± 0.01 ab	0.21 ± 0.00 b	0.28 ± 0.02 c	**	7	1.68 ± 0.11 a	1.78 ± 0.04 a	1.89 ± 0.09 a	1.85 ± 0.06 a		+
10	-	0.19 ± 0.01 a	0.18 ± 0.01 a	0.22 ± 0.01 b	0.29 ± 0.01 c	**	10	-	1.81 ± 0.02 a	1.79 ± 0.10 a	1.86 ± 0.05 a	1.98 ± 0.01 b	*
12	0.18 ± 0.01 a	0.19 ± 0.00 b	0.19 ± 0.01 b	0.23 ± 0.00 c	0.32 ± 0.00 d	**	12	1.60 ± 0.09 a	1.80 ± 0.00 ab	2.03 ± 0.05 b	1.84 ± 0.06 a	1.96 ± 0.03 ab	*
Peroxide Value (meq O2/kg)							K270 (Absorbance Units)
Month	C1	C2	C3	C4	C5	p-Value	Month	C1	C2	C3	C4	C5	p-Value
0	2.9 ± 0.1	2.9 ± 0.1	2.9 ± 0.1	2.9 ± 0.1	2.9 ± 0.1	-	0	0.09 ± 0.01	0.09 ± 0.01	0.09 ± 0.01	0.09 ± 0.01	0.09 ± 0.01	-
2	-	5.5 ± 0.2 c	4.4 ± 0.0 a	5.1 ± 0.2 bc	4.8 ± 0.1 ab	**	2		0.11 ± 0.01 c	0.08 ± 0.01 a	0.09 ± 0.00 ab	0.11 ± 0.01 bc	**
3	-	6.7 ± 0.5 b	4.6 ± 0.1 a	4.9 ± 0.0 a	5.3 ± 0.6 a	**	3		0.12 ± 0.00 c	0.09 ± 0.00 a	0.10 ± 0.01 ab	0.11 ± 0.01 b	**
4	3.5 ± 0.1 a	6.7 ± 0.1 d	4.8 ± 0.1 b	5.2 ± 0.2 c	4.6 ± 0.0 b	**	4	0.09 ± 0.01 a	0.13 ± 0.00 c	0.09 ± 0.01 a	0.10 ± 0.00 a	0.12 ± 0.00 b	**
5	-	7..2 ± 0.7 b	5.3 ± 0.2 a	5.1 ± 0.1 a	5.0 ± 0.2 a	**	5		0.13 ± 0.01 b	0.09 ± 0.00 a	0.10 ± 0.00 a	0.12 ± 0.01 b	**
6	-	7.4 ± 0.00 b	5.3 ± 0.4 a	5.1 ± 0.0 a	4.4 ± 0.0 a	*	6		0.13 ± 0.00 c	0.09 ± 0.01 a	0.11 ± 0.01 b	0.13 ± 0.00 c	**
7	3.4 ± 0.1 a	7.9 ± 0.01 c	5.6 ± 0.8 b	5.1 ± 0.3 b	4.3 ± 0.6 ab	**	7	0.09 ± 0.01 a	0.13 ± 0.01 c	0.09 ± 0.00 a	0.11 ± 0.01 b	0.15 ± 0.01 c	**
10	-	8.5 ± 0.8 c	5.1 ± 0.1 ab	5.7 ± 0.2 b	4.0 ± 0.4 a	**	10		0.15 ± 0.01 c	0.09 ± 0.01 a	0.12 ± 0.00 b	0.17 ± 0.01 d	**
12	3.3 ± 0.1 a	8.2 ± 0.8 d	5.9 ± 0.2 c	5.3 ± 0.1 bc	4.4 ± 0.2 b	**	12	0.09 ± 0.00 a	0.15 ± 0.01 c	0.10 ± 0.01 a	0.13 ± 0.00 b	0.18 ± 0.01 d	**

Abbreviation: C1, −23 ± 2 °C in darkness; C2, 23 ± 2 °C with light; C3, 23 ± 2 °C in darkness; C4, 30 ± 2 °C in darkness; C5 40 ± 2 °C in darkness. Different letters in the same row indicate significant differences between storage conditions. p-Value (HSD Tukey) *: p < 0.05; **: p < 0.001; +: no significant difference.