Open Access

Table 3

Changes in the levels of volatile compounds (%) in monovarietal (Chemlali, Chetoui, Oueslati and Koroneiki) and blended olive oil samples obtained from fruit mixtures (F1…F8) or oil mixtures (O1…O8).

Chemlali 100% Chetoui 100% Oueslati 100% Koroneiki 100% Chemlali × Chetoui

50% Chetoui 40% Chetoui


F1 O1 F2 O2
Hexanal 2.90 ± 0.28 fghi 6.30 ± 0.28 a 4.40 ± 0.28 bc 3.10 ± 0.28 efgh 2.30 ± 0.14 i 3.30 ± 0.28 efg 3.10 ± 0.28 efgh 5.70 ± 0.28 a
(E)-2-Hexenal 33.80 ± 0.57 i 15.60 ± 0.57 k 50.40 ± 0.57 cd 31.30 ± 0.71 j 45.65 ± 1.20 e 9.70 ± 0.42 l 62.00 ± 1.56 a 29.50 ± 1.98 j
(Z)-2-Hexenal
(Z)-3-Hexenal 0.80 ± −0.00 fgh 8.10 ± 0.42 a 0.90 ± 0.14 efg 2.10 ± 0.14 b 1.25 ± 0.07 cd 1.00 ± 0.14 def 0.60 ± 0.00 hi 1.40 ± 0.14 c
(Z)-2-Heptenal 0.60 ± 0.00 a 0.55 ± 0.07 b 0.30 ± 0.00 d 0.30 ± 0.00 d 0.55 ± 0.07 b
(E)-4-Oxohex-2-enal 2.80 ± 0.28 a 1.20 ± 0.14 c 0.50 ± 0.00 e 2.20 ± 0.28 b
Nonanal 1.40 ± 0.00 efg 1.05 ± 0.07 gh 0.80 ± 0.14 hi 0.45 ± 0.07 i 0.80 ± 0.14 hi 2.95 ± 0.50 ab 1.20 ± 0.14 fgh 3.20 ± 0.28 a
1,3-Butanediol 0.70 ± 0.00 a 0.40 ± 0.00 b
(E)-2-Penten-1-ol 2.40 ± 0.14 bcd 1.70 ± 0.28 fg 0.40 ± 0.00 h 2.10 ± 0.28 bcdef 1.60 ± 0.28 fg 1.95 ± 0.35 cdefg 1.80 ± 0.28 efg 2.60 ± 0.28 b
1-Hexanol 2.60 ± 0.14 fg 3.00 ± 0.14 def 1.60 ± 0.14 h 3.30 ± 0.28 cde 1.40 ± 0.14 h 8.40 ± 0.57 a 2.00 ± 0.28 gh 4.05 ± 0.35 b
(E)-2-Hexen-1-ol 13.90 ± 0.42 b 14.10 ± 0.57 b 6.10 ± 0.28 g 17.60 ± 0.71 a 10.75 ± 0.64 d 1.90 ± 0.14 h
(Z)-3-Hexen-1-ol 7.50 ± 0.42 b 1.95 ± 0.07 d 14.15 ± 0.92 a 6.80 ± 0.71 c
3-Ethyl-1-hexanol 0.30 ± 0.00 bc 0.20 ± 0.00 cd 0.30 ± 0.00 bc 0.20 ± 0.00 cd 0.45 ± 0.07 a 0.50 ± 0.14 a
Benzyl alcohol 1.70 ± 0.14 a 1.30 ± 0.14 b 0.30 ± 0.00 h 0.50 ± 0.00 gh 0.60 ± 0.00 fg 1.75 ± 0.35 a 0.50 ± 0.00 gh 1.20 ± 0.14 bc
Phenylethyl alcohol 2.40 ± 0.14 b 1.30 ± 0.14 c 0.50 ± 0.00 fg 1.30 ± 0.00 c 0.40 ± 0.00 g 1.25 ± 0.35 cd 0.50 ± 0.00 fg 1.30 ± 0.28 c
(Z)-3-Hexenyl acetate 0.70 ± 0.00 j 12.40 ± 0.42 a 8.40 ± 0.57 b 5.25 ± 0.50 g 7.60 ± 0.57 c 4.30 ± 0.42 h 6.90 ± 0.42 cd
1-Hexyl acetate 6.80 ± 0.28 a 0.20 ± 0.00 h 3.90 ± 0.28 b 2.95 ± 0.35 cd 3.80 ± 0.42 b 2.40 ± 0.28 de 3.20 ± 0.28 c
Methyl salicylate 3.40 ± 0.42 a 0.75 ± 0.07 f 1.90 ± 0.28 bcd 1.60 ± 0.28 cde 2.15 ± 0.21 b
n-Tetradecane 2.80 ± 0.28 a 1.50 ± 0.14 efg 1.05 ± 0.07 gh 1.50 ± 0.14 efg 2.00 ± 0.14 cd 1.95 ± 0.21 cd 1.20 ± 0.28 fg 1.40 ± 0.28 fg
n-dodecane 0.40 ± 0.00 c 0.40 ± 0.00 c 0.30 ± 0.00 d 0.40 ± 0.00 c 0.60 ± 0.14 a 0.40 ± 0.00 c
3-Ethyl-1,5-octadiene 4.10 ± 0.14 abc 2.85 ± 0.21 gh 3.20 ± 0.28 efg 2.40 ± 0.14 h 3.00 ± 0.42 fgh 3.50 ± 0.57 cdefg 2.85 ± 0.07 gh 3.50 ± 0.28 cdefg
3,7-Decadiene 7.95 ± 0.35 abc 6.60 ± 0.28 def 6.10 ± 0.14 efg 4.90 ± 0.42 h 4.70 ± 0.28 h 8.05 ± 0.92 abc 5.40 ± 0.28 fgh 7.15 ± 0.64 cde
4,8-Dimethyl-1,3,7-nonatriene 1.50 ± 0.00 def 1.20 ± 0.14 ef 2.60 ± 0.28 a 2.50 ± 0.14 a 0.40 ± 0.00 g 1.10 ± 0.14 f 0.45 ± 0.07 g 0.60 ± 0.00 g
(E)-2-Dodecene 3.20 ± 0.28 j 5.20 ± 0.28 g 1.75 ± 0.21 k 18.55 ± 0.64 a 3.20 ± 0.28 j 5.20 ± 0.57 g 3.60 ± 0.42 i 4.80 ± 0.14 h
Limonene 2.30 ± 0.14 a 1.75 ± 0.07 b 0.80 ± 0.14 fg 0.85 ± 0.07 fg 0.70 ± 0.00 fg 1.20 ± 0.28 cde 0.65 ± 0.07 fg 1.50 ± 0.28 bc
α-Pinene 1.70 ± 0.14 a 0.40 ± 0.00 c 0.20 ± 0.00 d 0.40 ± 0.00 c 0.70 ± 0.14 b 0.40 ± 0.00 c
(E)-β-Ocimene 3.00 ± 0.28 abc 3.10 ± 0.28 ab 0.25 ± 0.07 j 0.00 j 2.80 ± 0.28 abcd 3.40 ± 0.42 a 2.50 ± 0.28 bcd 3.20 ± 0.14 a
α-copaene 0.5 ± 0.00 b 0.00 f 0.00 f 0.00 f 0.00 f 0.35 ± 0.07 d 0.30 ± 0.00 de 0.60 ± 0.00 a
(E,E)-α-Farnesene 5.60 ± 0.28 a 1.60 ± 0.14 d 3.20 ± 0.42 b 2.00 ± 0.28 c 2.30 ± 0.28 c
hexanal/(E)-2-hexenal ratio 0.09 ± 0.01 de 0.40 ± 0.03 a 0.10 ± 0.01 d 0.09 ± 0.01 de 0.05 ± 0.00 h 0.34 ± 0.04 b 0.05 ± 0.00 h 0.19 ± 0.00 c
Total aldehydes 39.50 ± 0.28 jk 31.60 ± 0.71 l 56.80 ± 0.28 de 37.75 ± 0.35 k 50.00 ± 0.85 g 16.95 ± 0.21 m 66.90 ± 1.70 b 40.35 ± 2.33 j
Total alcohols 24.00 ± 0.14 b 15.40 ± 0.28 g 17.20 ± 0.42 f 15.45 ± 0.92 g 21.60 ± 0.85 c 38.70 ± 0.71 a 4.80 ± 0.57 l 18.35 ± 0.07 e
Total esters 4.10 ± 0.42 g 19.20 ± 0.71 a 0.20 ± 0.00 e 12.30 ± 0.28 b 8.95 ± 0.07 de 13.30 ± 1.27 b 8.30 ± 0.42 e 12.25 ± 0.92 b
Total C6 compounds 54.00 ± 0.85 gh 43.30 ± 1.27 k 71.40 ± 0.00 a 49.55 ± 0.78 ij 68.20 ± 1.56 b 47.80 ± 0.57 j 67.70 ± 1.56 b 51.55 ± 2.05 hi
Total C5 compounds 2.40 ± 0.14 bcd 1.70 ± 0.28 fg 0.40 ± 0.00 h 2.10 ± 0.28 bcdef 1.60 ± 0.28 fg 1.95 ± 0.35 cdefg 1.80 ± 0.28 efg 2.60 ± 0.28 b
Total identified volatile compounds 95.05 ± 0.50 h 97.60 ± 0.00 fg 90.45 ± 0.35 i 97.80 ± 0.00 f 99.35 ± 0.07 ab 98.70 ± 0.14 cde 98.95 ± 0.21 bcd 99.00 ± 0.14 bc

Chemlali × Oueslati Chemlali × Koroneiki Chemlali × Chetoui × Koroneiki Chemlali × Oueslati × Koroneiki




50% Oueslati 40% Oueslati 50% Koroneiki 40% Koroneiki 20% Chetoui + 20% Koroneiki 20% Oueslati + 20% Koroneiki






F3 O3 F4 O4 F5 O5 F6 O6 F7 O7 F8 O8

Hexanal 4.95 ± 0.50 b 3.65 ± 0.35 de 3.50 ± 0.28 def 4.10 ± 0.42 cd 2.30 ± 0.28 i 2.70 ± 0.14 ghi 2.50 ± 0.14 hi 2.80 ± 0.28 fghi 3.30 ± 0.14 efg 2.80 ± 0.28 fghi 3.20 ± 0.42 efgh 2.90 ± 0.28 fghi
(E)-2-Hexenal 57.70 ± 0.85 b 62.80 ± 1.13 a 49.50 ± 0.99 d 59.10 ± 1.13 b 41.00 ± 0.57 fg 37.45 ± 0.78 h 48.50 ± 0.71 d 39.60 ± 1.13 g 49.30 ± 0.85 d 36.30 ± 0.57 h 52.20 ± 0.71 c 43.00 ± 0.99 f
(Z)-2-Hexenal 0.30 ± 0.00 c 0.60 ± 0.00 a 0.20 ± 0.00 d
(Z)-3-Hexenal 0.40 ± 0.00 ij 0.65 ± 0.07 ghi 0.40 ± 0.00 ij 0.20 ± 0.00 j 0.60 ± 0.00 hi 1.25 ± 0.07 cd 0.60 ± 0.00 hi 1.10 ± 0.14 de 0.50 ± 0.00 i 1.90 ± 0.14 b 0.40 ± 0.00 ij 1.15 ± 0.07 cde
(Z)-2-Heptenal 0.50 ± 0.00 b 0.50 ± 0.00 b 0.50 ± 0.00 b 0.40 ± 0.00 c 0.30 ± 0.00 d 0.50 ± 0.00 b 0.50 ± 0.00 b 0.50 ± 0.00 b
(E)-4-Oxohex-2-enal 0.80 ± 0.14 d 1.10 ± 0.14 c 1.20 ± 0.14 c 0.40 e
Nonanal 1.70 ± 0.14 def 3.40 ± 0.28 a 3.00 ± 0.28 ab 2.60 ± 0.42 bc 1.50 ± 0.00 efg 1.80 ± 0.28 de 1.55 ± 0.21 efg 2.20 ± 0.14 cd 1.70 ± 0.28 def 1.90 ± 0.14 de 1.80 ± 0.28 de 2.60 ± 0.42 bc
1,3-Butanediol
(E)-2-Penten-1-ol 0.85 ± 0.07 h 1.55 ± 0.21 fg 0.70 ± 0.00 h 1.40 ± 0.14 g 2.30 ± 0.28 bcde 2.45 ± 0.35 bcd 2.10 ± 0.28 bcdef 2.50 ± 0.14 bc 1.90 ± 0.14 defg 3.20 ± 0.42 a 1.80 ± 0.28 efg 2.00 ± 0.14 cdef
1-Hexanol 4.00 ± 0.28 b 3.00 ± 0.14 def 3.80 ± 0.42 bc 3.20 ± 0.28 cdef 1.80 ± 0.28 h 2.90 ± 0.28 ef 3.60 ± 0.42 bcd 2.00 ± 0.28 2.90 ± 0.42 ef 3.20 ± 0.28 cdef
(E)-2-Hexen-1-ol 2.10 ± 0.28 h 0.80 ± 0.14 i 2.10 ± 0.28 h 0.75 ± 0.07 i 8.80 ± 0.42 e 9.40 ± 0.42 e 1.20 ± 0.00 i 9.60 ± 0.71 e 1.00 ± 0.14 i 12.80 ± 0.57 c 0.90 ± 0.14 i 7.50 ± 0.57 f
(Z)-3-Hexen-1-ol
3-Ethyl-1-hexanol 0.10 ± 0.00 de 0.40 ± 0.00 ab 0.30 ± 0.00 bc 0.30 ± 0.00 bc 0.30 ± 0.00 bc 0.20 ± 0.00 cd 0.20 ± 0.00 cd 0.50 ± 0.14 a 0.50 ± 0.00 a
Benzyl alcohol 0.80 ± 0.14 def 0.60 ± 0.00 fg 1.00 ± 0.14 cd 0.90 ± 0.14 de 0.80 ± 0.14 def 0.70 ± 0.00 efg 0.60 ± 0.00 fg 0.60 ± 0.00 fg 0.75 ± 0.07 defg 0.80 ± 0.14 def 0.90 ± 0.00 de 0.65 ± 0.07 efg
Phenylethyl alcohol 0.55 ± 0.07 efg 0.85 ± 0.07 def 1.20 ± 0.14 cd 0.90 ± 0.00 cde 3.00 ± 0.28 a 1.15 ± 0.07 cd 1.10 ± 0.00 cd 1.30 ± 0.42 c 1.00 ± 0.00 cd 1.15 ± 0.07 cd 1.00 ± 0.00 cd 1.20 ± 0.14 cd
(Z)-3-Hexenyl acetate 0.50 ± 0.00 j 5.90 ± 0.42 efg 6.50 ± 0.42 de 5.40 ± 0.28 g 5.70 ± 0.42 efg 5.60 ± 0.28 fg 6.30 ± 0.57 def 3.20 ± 0.28 i 4.20 ± 0.57 h
1-Hexyl acetate 2.20 ± 0.14 ef 2.40 ± 0.42 de 1.80 ± 0.28 f 2.20 ± 0.42 ef 2.10 ± 0.14 ef 2.80 ± 0.42 cd 0.90 ± 0.00 g 1.15 ± 0.07 g
Methyl salicylate 1.50 ± 0.00 de 1.70 ± 0.14 bcd 3.10 ± 0.28 a 2.10 ± 0.14 bc 1.10 ± 0.14 ef 1.55 ± 0.07 de 1.55 ± 0.07 de 1.80 ± 0.28 bcd 2.00 ± 0.14 bcd 1.60 ± 0.28 cde 2.10 ± 0.28 bc 1.80 ± 0.42 bcd
n-Tetradecane 1.80 ± 0.14 de 1.45 ± 0.07 efg 2.00 ± 0.28 cd 2.60 ± 0.28 ab 0.70 ± 0.00 h 1.10 ± 0.14 gh 2.30 ± 0.14 bc 2.30 ± 0.28 bc 1.05 ± 0.07 gh 1.70 ± 0.14 de 1.60 ± 0.14 def 1.20 ± 0.14 fg
n-dodecane 0.40 ± 0.00 c 0.45 ± 0.07 bc 0.60 ± 0.00 a 0.40 ± 0.00 c 0.40 ± 0.00 c 0.50 ± 0.00 b 0.50 ± 0.00 b
3-Ethyl-1,5-octadiene 4.60 ± 0.28 a 3.25 ± 0.50 defg 4.20 ± 0.14 abc 4.00 ± 0.57 abcd 4.40 ± 0.00 ab 3.10 ± 0.57 fgh 3.60 ± 0.14 cdefg 3.65 ± 0.21 bcdef 3.75 ± 0.21 bcdef 3.50 ± 0.42 cdefg 4.20 ± 0.00 abc 3.90 ± 0.28 abcde
3,7-Decadiene 9.15 ± 0.64 a 7.10 ± 0.28 cde 8.60 ± 0.71 ab 8.00 ± 0.85 abc 7.60 ± 0.00 bcd 6.20 ± 0.85 ef 6.90 ± 0.28 cde 7.25 ± 0.07 cde 7.05 ± 0.78 cde 6.70 ± 0.71 cde 8.00 ± 0.28 abc 8.60 ± 0.85 ab
4,8-Dimethyl-1,3,7-nonatriene 1.55 ± 0.07 de 2.10 ± 0.28 bc 2.40 ± 0.28 ab 1.75 ± 0.21 cd 1.65 ± 0.21 d 1.90 ± 0.28 cd 1.70 ± 0.14 cd 1.80 ± 0.14 cd 1.20 ± 0.14 ef 1.20 ± 0.14 ef 1.50 ± 0.00 def 1.80 ± 0.28 cd
(E)-2-Dodecene 3.10 ± 0.28 j 3.10 ± 0.28 j 6.00 ± 0.42 f 3.10 ± 0.57 j 10.00 ± 0.42 d 15.50 ± 0.71 b 11.10 ± 0.57 c 10.20 ± 0.85 cd 7.50 ± 0.71 e 6.10 ± 0.57 f 7.60 ± 0.71 e 7.20 ± 0.57 e
Limonene 0.60 ± 0.00 g 0.75 ± 0.07 fg 2.20 ± 0.28 a 1.20 ± 0.14 cde 1.00 ± 0.14 def 0.90 ± 0.14 efg 0.75 ± 0.07 fg 1.20 ± 0.14 cde 0.70 ± 0.00 fg 0.90 ± 0.14 efg 1.30 ± 0.14 cd 0.10 ± 0.00 h
α-Pinene 0.40 ± 0.00 c 0.40 ± 0.00 c 0.40 ± 0.00 c 0.40 ± 0.00 c
(E)-β-Ocimene 2.20 ± 0.28 def 1.45 ± 0.21 ghi 2.20 ± 0.42 def 1.80 ± 0.14 efg 1.00 ± 0.14 i 1.10 ± 0.14 hi 1.40 ± 0.14 ghi 1.50 ± 0.42 ghi 2.45 ± 0.35 cd 2.40 ± 0.28 cde 1.80 ± 0.28 efg 1.70 ± 0.28 fgh
α-copaene 0.30 ± 0.00 de 0.25 ± 0.07 e 0.00 f 0.40 ± 0.00 c 0.00 f 0.30 ± 0.00 de 0.30 ± 0.00 de 0.00 f 0.30 ± 0.00 de 0.00 f 0.40 ± 0.00 c
(E,E)-α-Farnesene 0.20 ± 0.00 f 1.40 ± 0.14 d 0.80 ± 0.00 e
hexanal/(E)-2-hexenal ratio 0.09 ± 0.01 de 0.06 ± 0.00 g 0.07 ± 0.00 f 0.07 ± 0.01 ef 0.06 ± 0.01 fg 0.07 ± 0.01 ef 0.05 ± 0.00 h 0.07 ± 0.01 ef 0.07 ± 0.00 f 0.08 ± 0.01 e 0.06 ± 0.01 fg 0.07 ± 0.01 ef
Total aldehydes 64.75 ± 1.48 c 71.00 ± 1.13 a 56.90 ± 0.99 de 66.50 ± 0.28 bc 45.80 ± 0.85 h 43.20 ± 0.28 i 53.75 ± 0.64 f 46.20 ± 1.13 h 55.40 ± 0.42 ef 43.40 ± 1.13 i 57.80 ± 0.00 d 50.15 ± 0.92 g
Total alcohols 8.30 ± 0.14 ij 6.90 ± 0.57 k 9.20 ± 0.42 i 7.45 ± 0.35 jk 17.00 ± 0.57 f 14.00 ± 0.71 h 8.10 ± 0.57 ijk 14.00 ± 0.42 h 8.45 ± 0.50 ij 19.95 ± 0.21 d 8.00 ± 0.99 ijk 15.05 ± 0.35 gh
Total esters 1.50 ± 0.00 h 1.70 ± 0.14 h 3.60 ± 0.28 g 2.10 ± 0.14 h 9.20 ± 0.71 de 10.45 ± 0.07 c 8. 75 ± 0.07 de 9.70 ± 0.57 cd 9.70 ± 0.28 cd 10.70 ± 0.71 c 6.20 ± 0.57 f 7.15 ± 0.07 f
Total C6 compounds 69.15 ± 1.34 ab 70.90 ± 1.13 a 59.30 ± 1.13 cd 67.35 ± 0.35 b 54.50 ± 0.71 fg 51.60 ± 0.85 hi 56.00 ± 0.57 efg 54.20 ± 1.84 gh 58.30 ± 0.99 cde 57.00 ± 1.70 def 59.80 ± 0.28 c 58.15 ± 1.63 cde
Total C5 compounds 0.85 ± 0.07 h 1.55 ± 0.21 fg 0.70 ± 0.00 h 1.40 ± 0.14 g 2.30 ± 0.28 bcde 2.45 ± 0.35 bcd 2.10 ± 0.28 bcdef 2.50 ± 0.14 bc 1.90 ± 0.14 defg 3.20 ± 0.42 a 1.80 ± 0.28 efg 2.00 ± 0.14 cdef
Total identified volatile compounds 98.65 ± 0.07 cde 99.50 ± 0.14 a 97.30 ± 0.00 g 99.50 ± 0.28 a 98.35 ± 0.07 e 98.95 ± 0.21 bcd 99.05 ± 0.07 bc 99.50 ± 0.00 a 99.35 ± 0.07 ab 98.55 ± 0.21 de 99.30 ± 0.00 ab 97.75 ± 0.07 f

Each value is an average of three determinations ± S.D. Values in the same row with different letters show statistically significant differences (P < 0.05).

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