Table 2.
Absolute areas of volatile compounds identified in home-made and commercial strawberry jams by the SPME-GC-MS method developed and the experimental conditions selected (i.e., CAR/PDMS fibre, 60 °C, 60 min).
| Numbers | Compounds | Home-Made Strawberry Jam | Commercial Strawberry Jam |
|---|---|---|---|
| 1 | 2-Methyl-1-penten-3-one | n.d. a | 6,060,266 ± 0.103 |
| 2 | Butyric acid | 798,148 ± 0.231 | n.d. |
| 3 | Hexanal | 667,617 ± 0.213 a | 600,082 ± 0.111 a |
| 4 | Furfural | 105,220,694 ± 0.105 a | 39,931,568 ± 0.206 b |
| 5 | 2,5-Dimethyl-4-methoxy-3-(2H)-furanone (mesifurane) | 2,080,383 ± 0.182 a | 1,328,358 ± 0.232 b |
| 6 | 5-Methylfurfural | 7,981,259 ± 0.098 | n.d. |
| 7 | Benzaldehyde | 18,199,786 ± 0.114 a | 2,818,282 ± 0.157 b |
| 8 | 2-Acetylfuran | 1,132,193 ± 0.098 a | 25,701 ± 0.121 b |
| 9 | Acetophenone | 328,488 ± 0.214 | n.d. |
| 10 | Nonanal | 468,206 ± 0.036 | n.d. |
| 11 | Phenylacetaldehyde | 398,036 ± 0.213 | n.d. |
| 12 | 2-Methylbutyric acid | 464,182 ± 0.086 a | 426,165 ± 0.145 a |
| 13 | 2-Heptanone | 1,735,403 ± 0.201 | n.d. |
| 14 | Methyl 3-hydroxyhexanoate | 578,543 ± 0.193 | n.d. |
| 15 | Benzyl alcohol | 6,830,691 ± 0.231 a | 1 574,617 ± 0.254 b |
| 16 | Hexanoic acid | 521,249 ± 0.087 a | 5,347,177 ± 0.113 b |
| 17 | 2-Hexenylhexanoate | 853,129 ± 0.151 | n.d. |
| 18 | Ethyl 3-hydroxyhexanoate | 3,201,276 ± 0.183 | n.d. |
| 19 | (-)-α-Terpineol | 717,332 ± 0.075 a | 1,854,972 ± 0.165 b |
| 20 | (+)-α-Terpineol | 983,539 ± 0.189 a | 2,165,148 ± 0196 b |
| 21 | 2,4-Hexadienoic acid | n.d. | 813,206 ± 0.118 |
| 22 | Isobutyric acid | n.d. | 2,252,812 ± 0.126 |
| 23 | Furan | 717,332 ± 0.105 | n.d. |
| 24 | 5-Hydroxymethyl-2-furfural | 683,539 ± 0.143 a | 6,528,233 ± 0.177 b |
| 25 | Benzyl acetate | n.d. | 414,871 ± 0.123 |
| 26 | 2,4-Bis (1,1-dimethylethyl)-phenol (BHT) | n.d. | 2,501,944 ± 0.169 |
| 27 | ɣ-Butyrolactone | n.d. | 866,534 ± 0.088 |
| 28 | Methyl 3-hydroxyoctanoate | n.d. | 159,336 ± 0.092 |
| 29 | Farnesol | 451,790 ± 0.099 | n.d. |
| 30 | (−)-Furaneol | 6,019,384 ± 0.116 | n.d. |
a Not detected; Data are presented as means (n = 3) ± SD where n refers to three independent samples; Different letters for the same compound in the same column between samples indicate differences at p < 0.05.