Effects of filtration process on the minor constituents and oxidative stability of virgin olive oil during 24 months storage time | OCL

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Table 1

Oxidative stability parameters of virgin olive oils extacted from Saurani variety during 24 months storage.

Storage period (Month)	Free Fatty Acid Content		Peroxide Value		K₂₃₂		K₂₇₀

	F	UF	F	UF	F	UF	F	UF
0	0.4 ± 0.00^f	0.4 ± 0.00^f	8.99 ± 0.003^q	11.97 ± 0.003ⁿ	2.0 ± 0.00^b	2.0 ± 0.00^d	0.19 ± 0.00^e	0.18 ± 0.00^e
1	0.6 ± 0.00^e	0.7 ± 0.00^e	8.99 ± 0.000^q	12.02 ± 0.038ⁿ	2.2 ± 0.00^a	2.3 ± 0.00^b	0.21 ± 0.00^d	0.21 ± 0.00^b
2	0.7 ± 0.00^d	0.7 ± 0.00^e	11.93 ± 0.027⁰	14.88 ± 0.015^m	2.2 ± 0.00^a	2.5 ± 0.00^a	0.21 ± 0.00^d	0.20 ± 0.00^c
3	0.7 ± 0.00^d	0.8 ± 0.00^d	14.89 ± 0.025ⁱ	24.00 ± 0.003^a	2.2 ± 0.00^a	2.0 ± 0.00^d	0.21 ± 0.00^d	0.19 ± 0.00^d
4	0.7 ± 0.00^d	0.8 ± 0.00^d	14.98 ± 0.020^k	23.00 ± 0.135^b	1.9 ± 0.00^c	1.9 ± 0.00^e	0.12 ± 0.00^k	0.16 ± 0.00^g
5	0.7 ± 0.00^d	0.8 ± 0.00^d	14.99 ± 0.001^k	23.82 ± 0.069^ab	1.7 ± 0.00^e	1.5 ± 0.00ⁱ	0.11 ± 0.00^l	0.10 ± 0.00^j
6	0.7 ± 0.00^d	0.8 ± 0.00^d	17.94 ± 0.017^g	21.01 ± 0.019^c	1.8 ± 0.00^d	1.7 ± 0.00^g	0.24 ± 0.00^b	0.21 ± 0.00^b
7	0.7 ± 0.00^d	0.8 ± 0.00^d	17.97 ± 0.001^g	20.88 ± 0.007^cd	2.2 ± 0.00^a	2.2 ± 0.00^c	0.21 ± 0.00^d	0.21 ± 0.00^b
8	0.7 ± 0.00^d	0.8 ± 0.00^d	17.98 ± 0.013^g	20.85 ± 0.007^d	1.8 ± 0.00^d	1.7 ± 0.00^g	0.24 ± 0.00^b	0.21 ± 0.00^b
9	0.7 ± 0.00^d	0.8 ± 0.00^d	17.99 ± 0.005^g	20.62 ± 0.031^e	1.3 ± 0.00^g	1.4 ± 0.00^j	0.10 ± 0.00^m	0.17 ± 0.00^f
10	0.7 ± 0.00^d	0.8 ± 0.00^d	20.97 ± 0.002^a	17.80 ± 0.060^f	1.6 ± 0.00^f	1.7 ± 0.00^g	0.13 ± 0.00^j	0.15 ± 0.00^h
11	0.7 ± 0.00^d	0.9 ± 0.00^c	20.73 ± 0.030^a	17.80 ± 0.010^f	1.7 ± 0.00^e	1.6 ± 0.00^h	0.17 ± 0.00^g	0.18 ± 0.00^e
12	0.7 ± 0.00^d	0.9 ± 0.00^c	20.72 ± 0.048^a	17.79 ± 0.023^f	1.6 ± 0.00^f	1.6 ± 0.00^h	0.11 ± 0.00^l	0.15 ± 0.00^h
13	0.8 ± 0.00^c	0.9 ± 0.00^c	20.70 ± 0.007^b	17.54 ± 0.012^g	1.6 ± 0.00^f	1.6 ± 0.00^h	0.11 ± 0.00^l	0.15 ± 0.00^h
14	0.8 ± 0.00^c	1.0 ± 0.01^b	20.12 ± 0.013^c	17.15 ± 0.042^h	0.4 ± 0.00^k	0.3 ± 0.00⁰	0.14 ± 0.00ⁱ	0.17 ± 0.00^l
15	0.8 ± 0.00^c	1.0 ± 0.01^b	19.84 ± 0.007^d	17.02 ± 0.021^h	0.5 ± 0.00^j	0.4 ± 0.00ⁿ	0.22 ± 0.00^c	0.21 ± 0.00^b
16	0.8 ± 0.00^c	1.0 ± 0.00^b	19.56 ± 0.021^e	16.35 ± 0.011ⁱ	1.1 ± 0.00^h	0.9 ± 0.00^m	0.21 ± 0.00^d	0.13 ± 0.00ⁱ
17	0.8 ± 0.00^c	1.0 ± 0.01^b	18.48 ± 0.031^f	16.31 ± 0.001ⁱ	2.0 ± 0.00^b	1.6 ± 0.00^h	0.17 ± 0.00^g	0.13 ± 0.00ⁱ
18	0.8 ± 0.00^c	1.0 ± 0.00^b	17.95 ± 0.024^g	16.12 ± 0.041^j	1.0 ± 0.00ⁱ	1.2 ± 0.00^k	0.19 ± 0.00^e	0.21 ± 0.00^b
19	0.8 ± 0.00^c	1.0 ± 0.00^b	17.62 ± 0.016^h	16.12 ± 0.011^j	1.8 ± 0.00^d	1.7 ± 0.00^g	0.18 ± 0.00^f	0.15 ± 0.00^h
20	0.8 ± 0.00^c	1.0 ± 0.01^b	16.33 ± 0.011ⁱ	15.85 ± 0.066^k	1.8 ± 0.00^d	1.9 ± 0.00^e	0.15 ± 0.00^h	0.13 ± 0.00ⁱ
21	0.8 ± 0.00^c	1.0 ± 0.00^b	15.49 ± 0.034^j	15.46 ± 0.123^l	2.0 ± 0.00^b	1.9 ± 0.00^e	0.17 ± 0.00^g	0.16 ± 0.00^g
22	0.8 ± 0.00^c	1.0 ± 0.01^b	14.67 ± 0.022^m	14.95 ± 0.012^m	1.6 ± 0.00^f	1.8 ± 0.00^f	0.12 ± 0.00^k	0.22 ± 0.00^a
23	0.9 ± 0.00^b	1.1 ± 0.00^a	13.98 ± 0.008ⁿ	14.93 ± 0.125^m	1.7 ± 0.00^e	1.7 ± 0.00^g	0.12 ± 0.00^k	0.13 ± 0.00ⁱ
24	1.0 ± 0.00^a	1.1 ± 0.00^a	11.56 ± 0.025^p	11.73 ± 0.025⁰	1.8 ± 0.00^d	1.8 ± 0.00^f	0.14 ± 0.00ⁱ	0.17 ± 0.00^f

Note: Different superscript letters in the same column indicate significant difference between mean values (P < 0.01), N = 28.

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