Table 3.
Volatile profiles of red and White-fleshed pulp pitaya species using red and blue SPME fibers by HS-SPME/GC/MS techniques. Retention Time (R.T) percent (%).
| RI | R.T. | Compound Name | Red SPME (PDMS) | Blue SPME (PDMS/DVB) | ||
|---|---|---|---|---|---|---|
| Red Pitaya Pulp | White Pitaya Pulp | Red Pitaya Pulp | White Pitaya Pulp | |||
| Alcohols | ||||||
| 1777 | 40.861 | 1-Hexadecanol | 6.54 | 4.17 | - | - |
| 1587 | 36.229 | 1-Tetradecamol | - | 6.69 | - | - |
| 1027 | 19.111 | 2-ethyl-hexanol | - | - | 2.6 | - |
| 1472 | 33.177 | Lauryl alcohol | - | - | - | 37.17 |
| 1777 | 40.866 | Pentadecanol | - | - | 2.09 | - |
| 1586 | 36.188 | Tridecyl alcohol | 8.96 | - | 4.68 | - |
| Total Alcohols | 15.5 | 10.86 | 9.37 | 37.17 | ||
| Terpenes | ||||||
| 989 | 17.713 | l-Limonene | 2.23 | 2.70 | - | - |
| Total Terpenes | 2.23 | 2.70 | 0 | 0 | ||
| Ketones | ||||||
| 850 | 12.483 | 1-(2-furanyl)-Ethanone, | 3.24 | 4.11 | - | - |
| 1456 | 32.730 | 5-hexyldihydro- 2(3H)-Furanone, | - | - | - | 1.63 |
| 1781 | 40.952 | diphenyl-methanone, | - | - | - | 1.08 |
| 1714 | 39.369 | delta-dodecalactone | - | - | - | 1.30 |
| Total Ketones | 3.24 | 4.11 | 0 | 4.01 | ||
| Aldehydes | ||||||
| 996 | 17.990 | 2 Octenal | - | - | 6.84 | - |
| 1144 | 23.200 | 2,4 Nonadienal | - | - | 1.56 | - |
| 1192 | 24.783 | (E)- 2-Decenal | 2.2 | 10.13 | 2.76 | - |
| 771 | 9.563 | 2-Furancarboxaldehyde | 17.37 | - | - | - |
| 898 | 14.288 | (Z)-2-Heptenal | - | - | 5.11 | - |
| 1100 | 21.724 | 3-methyl benzaldehyde | - | - | - | 1.37 |
| 1011 | 18.540 | Caprylaldehyde | - | 2.08 | - | - |
| 746 | 8.669 | Hexanal | 19.36 | 17.23 | 32.85 | - |
| 1158 | 23.658 | 2(E)Nonenal | - | - | 2.75 | - |
| 1044 | 19.721 | Nonanal | 2.23 | 8.13 | 4.05 | - |
| 947 | 16.131 | Octanal | - | 6.34 | 1.8 | - |
| 1289 | 27.865 | Trans-2-dodecenal | - | 7.69 | 0.98 | 0.57 |
| 1173 | 24.159 | trans-2-Undecenal | - | - | - | 0.86 |
| Total Aldehydes | 41.16 | 51.60 | 58.70 | 2.80 | ||
| Esters | ||||||
| 1643 | 37.628 | 1,2-Benzenedicarboxylic acid, diethyl ester | - | - | - | 29.9 |
| Total Esters | 0 | 0 | 0 | 29.9 | ||
| Acids | ||||||
| 1194 | 24.851 | Caprylic acid | - | 2.58 | - | - |
| 1551 | 35.285 | Decanoic acid | - | - | - | 3.36 |
| 1792 | 41.201 | Dodecanoic acid | - | - | - | 1.8 |
| 1321 | 28.818 | Heptanoic acid | - | - | - | 0.81 |
| 922 | 15.222 | Hexanoic acid | 8.07 | 5.84 | 6.74 | 6.58 |
| 1194 | 24.852 | Nonanoic acid | 2.75 | - | 6.65 | - |
| 1102 | 21.787 | Octanoic acid | 4.37 | 4.7 | 2.35 | 13.05 |
| 1845 | 42.401 | Pentadecanoic acid | 12.14 | 6.46 | 3.53 | - |
| 1658 | 37.993 | Tetradecanoic acid | 2.69 | - | - | - |
| Total Acids | 30.02 | 19.58 | 19.27 | 25.6 | ||
| Other compounds | ||||||
| 767 | 9.430 | <1-methyl->Piperidine | 2.63 | - | - | - |
| 1438 | 32.206 | 2,6-bis(1,1-dimethylethyl)-4-methyl- Phenol | 5.2 | 8.49 | 3.05 | - |
| 1582 | 36.100 | 1,1′-oxybis- octane, | - | - | 2.05 | 0.53 |
| 1767 | 40.630 | 2,6,10,14-tetramethyl-hexadecane, | - | - | 5.2 | - |
| 1248 | 26.573 | Tridecane | - | 2.64 | 2.37 | - |
| Total Other Compounds | 7.83 | 11.13 | 12.67 | 0.53 | ||
-: not detected.