Journal of Food Quality / 2017 / Article / Tab 1

Research Article

Chemical Composition and Antioxidant Properties of Five White Onion (Allium cepa L.) Landraces

Table 1

Volatile compounds (mg/kg dw; mean ± SD) detected in Bianca di Pompei onion landraces.

NumberRTVolatile compoundmg/kg dw
FebbrareseMarzaticaAprilaticaMaggiaiolaGiugnese

Aldehydes
 16.7Propionaldehyde5.30 ± 0.1012.65 ± 0.2672.39 ± 1.51 ± 1.01132.51 ± 2.77
 223.42-Methyl-2-pentenaln.d.3.79 ± 0.0849.65 ± 1.0465.43 ± 1.3738.82 ± 0.81
 344.1Furfuraldehyde39.38 ± 1.3682.25 ± 2.84166.21 ± 5.7397.26 ± 3.35135.11 ± 4.66
 449.95-Methyl-2-furfuraldehyde35.68 ± 0.8713.48 ± 0.3368.76 ± 1.67105.06 ± 2.5688.84 ± 2.16
Total80.36 ± 1.67112.16 ± 2.33357.02 ± 7.42316.16 ± 6.58395.28 ± 8.23
Sulfur-containing compounds
 57.31-Propanethioln.d.5.42 ± 0.1164.04 ± 1.34127.95 ± 2.6794.69 ± 1.98
 69.7Propylene sulfide26.01 ± 0.8427.83 ± 1.4959.83 ± 1.9429.02 ± 0.9452.08 ± 1.69
 717.1Dimethyl sulfiden.d.22.35 ± 0.4718.00 ± 0.3853.87 ± 1.1316.88 ± 0.35
 825.8Methyl propyl disulfide10.04 ± 0.2725.51 ± 0.695.21 ± 0.1484.34 ± 2.2811.59 ± 0.31
 929.3cis-Methyl-1-propenyl disulfide3.67 ± 0.154.01 ± 0.1723.95 ± 0.9999.70 ± 4.1154.23 ± 2.23
 1029.55-Methyl-1,3-thiazolen.d.n.d.21.76 ± 0.4520.02 ± 0.4217.75 ± 0.37
 1131.9trans-Methyl-1-propenyl disulfide34.98 ± 0.7230.96 ± 0.67232.11 ± 3.47138.67 ± 0.87181.23 ± 2.76
 1232.93,4-Dimethyl thiophenen.d.n.d.184.18 ± 3.8540.46 ± 2.90127.86 ± 3.79
 1334.3Methyl-2-propenyl disulfide4.16 ± 0.177.97 ± 0.337.62 ± 0.3216.44 ± 0.69102.86 ± 4.31
 1437.5Dipropyl disulfide33.42 ± 0.7822.92 ± 0.5140.23 ± 0.9040.46 ± 0.9065.46 ± 1.46
 1539.81,2,4-Trithiolane3.51 ± 0.094.87 ± 0.13160.66 ± 6.12116.808 ± 3.154.74 ± 1.44
 1641.3trans-Propenyl propyl disulfide16.63 ± 0.6730.31 ± 1.2394.20 ± 3.8279.91 ± 3.2458.25 ± 2.36
 1742.9cis-Propenyl propyl disulfiden.d.n.d.112.60 ± 2.3521.32 ± 0.4533.42 ± 0.70
 1845.6Methyl propyl trisulfide38.86 ± 1.0146.03 ± 0.77276.67 ± 7.67379.52 ± 10.52226.48 ± 6.28
 1955.9Dipropyl trisulfide36.58 ± 0.8937.54 ± 0.86158.34 ± 3.6337.01 ± 0.8596.68 ± 2.22
Total207.87 ± 4.61265.72 ± 5.891459.40 ± 32.421285.48 ± 28.531194.19 ± 26.51
Ketones
 2051.11,2-Cyclopentanedione12.15 ± 0.3412.90 ± 0.3759.43 ± 1.6972.06 ± 2.0569.21 ± 1.97
 2153.7Butyrolactonen.d.n.d.47.56 ± 0.9959.98 ± 1.2564.25 ± 1.34
Total12.15 ± 0.3412.90 ± 0.37106.99 ± 4.09132.04 ± 5.04133.46 ± 5.10
Other
 2254.5Furfuryl alcohol34.90 ± 0.7318.34 ± 0.3843.97 ± 0.9264.81 ± 1.35156.85 ± 3.28

Total volatile compounds335.20 ± 9.77409.08 ± 11.901967.39 ± 43.701798.45 ± 39.931874.48 ± 41.75

Different letters (a, b, c, etc.) correspond to significant differences () among onion landraces.