Table 1.
The volatile aroma compounds of the two pineapple varieties.
| Classification | Compounds Name | Content/(μg·kg−1) | |
|---|---|---|---|
| Tainong No.6 | Tainong No. 4 | ||
| Esters | Butanoic acid, 2-methyl-, methyl ester | 19.48 | - |
| Butanoic acid, 2-hydroxy-2-methyl-, methyl ester | - | 32.27 | |
| Butanoic acid, 2-methyl-, ethyl ester | 22.24 | - | |
| Hexanoic acid, methyl ester | 4.71 | 67.75 | |
| Hexanoic acid, ethyl ester | 8.35 | - | |
| 2,4-Hexadienoic acid, methyl ester | 1.37 | - | |
| 3-(Methylthio)propanoic acid methyl ester | 32.94 | 622.49 | |
| Butane-2,3-diyl diacetate | 12.23 | - | |
| 3-(Methylthio)propanoic acid ethyl ester | 78.06 | 32.96 | |
| Octanoic acid, methyl ester | 20.52 | 142.25 | |
| Ethyl 3-hydroxyhexanoate | 8.61 | - | |
| Benzoic acid, ethyl ester | 9.68 | - | |
| Octanoic acid, ethyl ester | 46.21 | - | |
| Benzeneacetic acid, ethyl ester | 0.73 | - | |
| Dodecanoic acid, methyl ester | 18.28 | 16.33 | |
| Methyl cinnamate | 6.54 | - | |
| Decanoic acid, ethyl ester | 19.96 | - | |
| Ethyl cinnamate | 15.38 | - | |
| Dodecanoic acid, ethyl ester | 0.97 | - | |
| Total | 326.26 | 914.05 | |
|
| |||
| Terpenes | (±)-Dictyopterene A | 15.61 | - |
| 4,9-Muuroladiene | 3.64 | - | |
| α-Muurolene | 3.60 | 12.03 | |
| (−)-Alloaromadendrene | 1.26 | - | |
| 1,6-Cyclodecadiene | 0.52 | - | |
| Total | 24.63 | 12.03 | |
|
| |||
| Lactones | γ-Octalactone | 12.49 | - |
| 5-Hydroxyoctanoic acid lactone | 9.93 | - | |
| δ-Octalactone | - | 63.40 | |
| Total | 22.42 | 63.4 | |
|
| |||
| Ketones | 2,5-Dimethyl-4-hydroxy-3(2H)-furanone | - | 76.47 |
| Total | - | 76.47 | |
|
| |||
| Alcohol | 2,3-Dimethyl-undec-1-en-3-ol | - | 6.25 |
| Total | - | 6.25 | |
|
| |||
| Aldehydes | Decanal | 1.61 | - |
| Total | 1.61 | - | |
|
| |||
| Acids | Octanoic Acid | - | 8.24 |
| Ethyl (±)-3-acetoxybutyrate | 3.90 | - | |
| Total | 3.90 | 8.24 | |
|
| |||
| Alkenes | 3,4-Dimethoxystyrene | 1.84 | - |
| Total | 1.84 | - | |
|
| |||
| Grand total | 380.66 | 1080.44 | |
-: Not detected.