Characterization of sterolic and alcoholic fractions of some Algerian olive oils according to the variety and ripening stage | OCL

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Table 1

Ripening Index (RI) and means ± SDs of chemical quality criteria of Aghenfas, Buichret, Chemlal and Mekki olive oils at different olives harvest dates.

	End Sep	Mid-Oct	End Oct	Mid-Nov	End Nov	Mid-Dec	End Dec	Mid-Jan
RI
Chemlal	1.19 ± 0.06^a	1.85 ± 0.14^b	2.07 ± 0.09^b,c	2.49 ± 0.15^c	3.38 ± 0.20^d,e	3.30 ± 0.13^d	3.72 ± 0.18^e	4.47 ± 0.19^f
Aghenfas	1.31 ± 0.19^a	1.97 ± 0.18^b	2.30 ± 0.11^b,c	2.53 ± 0.15^c,d	3.07 ± 0.22^e	3.63 ± 0.19^e,f	3.44 ± 0.44^e,f	4.02 ± 0.27^f
Buichret	1.16 ± 0.13^a	1.70 ± 0.25^b	2.46 ± 0.09^c,d	2.39 ± 0.34^c	3.41 ± 0.40^d	3.67 ± 0.29^d,e	3.82 ± 0.19^d,e	4.35 ± 0.21^e
Mekki	1.26 ± 0.17^a	1.74 ± 0.14^b	2.17 ± 0.26^c,d	2.10 ± 0.23^c	3.20 ± 0.19^d	3.45 ± 0.22^d,e	3.76 ± 0.23^e,f	4.14 ± 0.08^g
Acidty (%)
Chemlal	0.10 ± 0.02^a	0.11 ± 0.01^a	0.12 ± 0.03^a	0.11 ± 0.04^a	0.16 ± 0.02^a	0.19 ± 0.02^a,b	0.22 ± 0.05^a,b	0.29 ± 0.06^b
Aghenfas	0.19 ± 0.04^a	0.20 ± 0.03^a	0.22 ± 0.02^a	0.20 ± 0.03^a	0.21 ± 0.04^a	0.25 ± 0.02^a,b	0.30 ± 0.01^b,c	0.32 ± 0.01^c
Buichret	0.13 ± 0.02^a	0.11 ± 0.02^a	0.12 ± 0.01^a	0.22 ± 0.02^b	0.30 ± 0.06^c	0.24 ± 0.04^b	0.28 ± 0.03^b,c	0.20 ± 0.05^b
Mekki	0.18 ± 0.03^a	0.22 ± 0.02^a	0.21 ± 0.04^a	0.23 ± 0.05^a	0.23 ± 0.04^a	0.29 ± 0.06^a,b	0.32 ± 0.04^b,c	0.37 ± 0.06^c
PV (meq O₂/kg)
Chemlal	8.46 ± 1.21^a,b	9.17 ± 2.11^b	8.45 ± 2.11^a,b	8.17 ± 1.82^a,b	7.82 ± 1.84^a,b	6.18 ± 0.90^a	5.02 ± 0.80^a	5.51 ± 0.17^a
Aghenfas	10.06 ± 0.33^b	8.13 ± 2.32^a	9.82 ± 0.73^a,b	8.55 ± 2.26^a	8.17 ± 1.09^a	8.58 ± 3.03^a	6.89 ± 0.97^a	6.10 ± 0.60^a
Buichret	9.24 ± 0.43^c	8.39 ± 1.69^b,c	8.21 ± 0.93^a,b	6.92 ± 0.85^a,b	6.09 ± 0.28^a	5.33 ± 0.30^a	5.42 ± 0.53^a	5.34 ± 0.22^a
Mekki	10.07 ± 0.73^b	11.92 ± 0.72^b	10.12 ± 0.78^b	9.89 ± 0.59^b	10.47 ± 1.42^b	8.99 ± 1.78^b	6.70 ± 1.51^a	6.50 ± 1.58^a
K₂₃₂
Chemlal	1.83 ± 0.12^b	1.75 ± 0.30^a,b	1.55 ± 0.22^a,b	1.31 ± 0.15^a	1.22 ± 0.08^a	1.32 ± 0.14^a	1.12 ± 0.21^a	1.08 ± 0.12^a
Aghenfas	1.73 ± 0.18^b	1.82 ± 0.24^a,b	1.74 ± 0.25^a,b	1.57 ± 0.16^a,b	1.26 ± 0.31^a	1.13 ± 0.26^a	1.27 ± 0.11^a	1.14 ± 0.22^a
Buichret	2.22 ± 0.33^a,b	2.23 ± 0.11^b	2.14 ± 0.18^a,b	2.10 ± 0.28^a,b	1.99 ± 0.19^a	2.03 ± 0.21^a,b	1.72 ± 0.12^a	1.65 ± 0.09^a
Mekki	2.29 ± 0.11^b	2.22 ± 0.29^a,b	2.22 ± 0.32^a,b	2.10 ± 0.25^a	2.15 ± 0.15^a	2.03 ± 0.05^a	1.75 ± 0.12^a	1.82 ± 0.06^a
K₂₇₀
Chemlal	0.18 ± 0.04^b	0.16 ± 0.03^a,b	0.17 ± 0.04^a,b	0.15 ± 0.03^a	0.14 ± 0.01^a	0.15 ± 0.02^a	0.11 ± 0.02^a	0.12 ± 0.02^a
Aghenfas	0.16 ± 0.03^a	0.15 ± 0.03^a	0.15 ± 0.01^a	0.13 ± 0.02^a	0.11 ± 0.06^a	0.13 ± 0.01^a	0.12 ± 0.04^a	0.13 ± 0.04^a
Buichret	0.20 ± 0.02^b	0.19 ± 0.02^a,b	0.17 ± 0.04^a	0.18 ± 0.01^a,b	0.15 ± 0.03^a	0.13 ± 0.01^a	0.15 ± 0.02^a	0.14 ± 0.03^a
Mekki	0.14 ± 0.01^a	0.14 ± 0.03^a	0.15 ± 0.01^a	0.14 ± 0.03^a	0.15 ± 0.02^a	0.13 ± 0.05^a	0.15 ± 0.04^a	0.13 ± 0.03^a

^a,b,c,d Values with the same letter in the same line are not significantly different at a 95% confidence level (P ≤ 0.05).

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