Table 2.
Concentration (in both ppb and μg· m−3) and the corresponding relative (mass) composition (RC) of the major strawberry volatiles (mass concentration abundance a ≥ 0.05 %: n = 53).
| Order | Compounds | Concentration | Relative composition a (RC: %) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
|
|||||||||||||||
| ppb | μgm−3 | |||||||||||||||
|
|
|
|||||||||||||||
| SRD-0 | SRD-1 | SRD-3 | SRD-6 | SRD-9 | SRD-0 | SRD-1 | SRD-3 | SRD-6 | SRD-9 | SRD-0 | SRD-1 | SRD-3 | SRD-6 | SRD-9 | ||
| A. Ester | ||||||||||||||||
| 1 | Methyl acetate | 3,949 | 3,875 | 71,077 | 1.57 | 0.75 | 11,945 | 11,720 | 214,987 | 4.76 | 2.28 | 17.4 | 20.0 | 29.4 | 1.25E-03 | 0.04 |
| 2 | Ethyl acetate | 4,793 | 4,277 | 134,969 | 130 | 11.8 | 17,240 | 15,384 | 485,476 | 467 | 42.5 | 25.1 | 26.3 | 66.4 | 0.12 | 0.70 |
| 3 | Methyl propionate | 40.8 | 51.0 | 23.6 | 0.17 | 8.75E-03 | 147 | 183 | 85.0 | 0.63 | 3.15E-02 | 0.21 | 0.31 | 0.01 | 1.64E-04 | |
| 4 | S-Methyl thioacetate | 94.2 | 129.3 | 3.07E-02 | 3.07E-02 | 3.07E-02 | 346 | 476 | 1.13E-01 | 1.13E-01 | 1.13E-01 | 0.51 | 0.81 | |||
| 5 | Isopropyl acetate | 52.8 | 16.7 | 27.5 | 4.95E-03 | 4.95E-03 | 220 | 69.5 | 114 | 2.06E-02 | 2.06E-02 | 0.32 | 0.12 | 0.02 | ||
| 6 | Ethyl propionate | 52.7 | 5.19E-03 | 53.5 | 5.19E-03 | 5.19E-03 | 220 | 2.17E-02 | 223 | 2.17E-02 | 2.17E-02 | 0.32 | 0.03 | |||
| 7 | Propyl acetate | 5.19E-03 | 5.19E-03 | 185 | 0.72 | 5.19E-03 | 2.17E-02 | 2.17E-02 | 769 | 3.02 | 2.17E-02 | 0.11 | 7.90E-04 | |||
| 8 | Methyl butyrate | 1,194 | 1,384 | 88.8 | 0.47 | 5.19E-03 | 4,977 | 5,772 | 370 | 1.95 | 2.17E-02 | 7.26 | 9.9 | 0.05 | 5.10E-04 | |
| 9 | Methyl 2-methylbutanoate | 21.8 | 21.7 | 13.2 | 1.08 | 3.35E-03 | 103 | 103 | 62.7 | 5.14 | 1.59E-02 | 0.15 | 0.18 | 0.01 | 1.35E-03 | |
| 10 | Isobutyl acetate | 9.11 | 7.00 | 88.9 | 1.86 | 3.35E-03 | 43.2 | 33.2 | 421 | 8.80 | 1.59E-02 | 0.06 | 0.06 | 0.06 | 2.30E-03 | |
| 11 | Methyl isovalerate | 54.8 | 56.9 | 7.78 | 3.35E-03 | 3.35E-03 | 260 | 270 | 36.9 | 1.59E-02 | 1.59E-02 | 0.38 | 0.46 | 0.01 | ||
| 12 | Ethyl butyrate | 1,537 | 1,142 | 171 | 1.50 | 3.48E-03 | 7,290 | 5,415 | 812 | 7.10 | 1.65E-02 | 10.6 | 9.3 | 0.11 | 1.86E-03 | |
| 13 | Butyl acetate | 34.2 | 36.5 | 26.4 | 0.05 | 3.49E-03 | 162 | 173 | 125 | 0.24 | 1.65E-02 | 0.24 | 0.30 | 0.02 | 6.19E-05 | |
| 14 | Isopropyl butyrate | 30.7 | 25.9 | 2.43E-03 | 2.43E-03 | 2.43E-03 | 163 | 138 | 1.29E-02 | 1.29E-02 | 1.29E-02 | 0.24 | 0.24 | |||
| 15 | Ethyl 2-methylbutyrate | 63.0 | 23.8 | 66.3 | 3.13 | 2.43E-03 | 335 | 126 | 352 | 16.6 | 1.29E-02 | 0.49 | 0.22 | 0.05 | 4.35E-03 | |
| 16 | Ethyl isovalerate | 142 | 67.2 | 36.1 | 0.70 | 2.43E-03 | 753 | 357 | 192 | 3.73 | 1.29E-02 | 1.10 | 0.61 | 0.03 | 9.76E-04 | |
| 17 | Isoamyl acetate | 81.3 | 69.1 | 165 | 1.21 | 2.43E-03 | 432 | 367 | 878 | 6.43 | 1.29E-02 | 0.63 | 0.63 | 0.12 | 1.68E-03 | |
| 18 | Ethyl valerate | 7.31 | 1.73 | 2.51E-03 | 2.51E-03 | 2.51E-03 | 38.8 | 9.22 | 1.33E-02 | 1.33E-02 | 1.33E-02 | 0.06 | 0.02 | |||
| 19 | Methyl hexanoate | 469 | 185 | 11.4 | 2.51E-03 | 2.51E-03 | 2,492 | 982 | 60.3 | 1.33E-02 | 1.33E-02 | 3.63 | 1.68 | 0.01 | ||
| 20 | trans-2-Hexenyl acetate | 38.6 | 1.78 | 1.90E-03 | 1.90E-03 | 1.90E-03 | 224 | 10.4 | 1.11E-02 | 1.11E-02 | 1.11E-02 | 0.33 | 0.02 | |||
| 21 | Ethyl hexanoate | 725 | 137 | 20.8 | 0.03 | 1.90E-03 | 4,270 | 808 | 123 | 0.16 | 1.12E-02 | 6.23 | 1.38 | 0.02 | 4.28E-05 | |
| 22 | Hexyl acetate | 110 | 25.5 | 4.70 | 1.90E-03 | 1.90E-03 | 647 | 150 | 27.7 | 1.12E-02 | 1.12E-02 | 0.94 | 0.26 | 3.79E-03 | ||
| 23 | Methyl octanoate | 5.84 | 0.88 | 1.49E-03 | 1.49E-03 | 1.49E-03 | 37.7 | 5.71 | 9.64E-03 | 9.64E-03 | 9.64E-03 | 0.06 | ||||
|
| ||||||||||||||||
| ΣConcentration or its RC (ester) | 52,346 | 42,553 | 705,116 | 526 | 44.7 | 76.3 | 72.7 | 96.5 | 0.14 | 0.74 | ||||||
|
| ||||||||||||||||
| B. Alcohol | ||||||||||||||||
| 1 | Ethyl alcohol | 3.72E-02 | 3.72E-02 | 309 | 48,685 | 1,417 | 7.00E-02 | 7.00E-02 | 580 | 91,537 | 2,665 | 0.08 | 23.9 | 43.8 | ||
| 2 | Isopropyl Alcohol | 8.76 | 4.58 | 45.3 | 92.8 | 278 | 21.5 | 11.2 | 111 | 228 | 681 | 0.03 | 0.02 | 0.02 | 0.06 | 11.2 |
| 3 | n-Propyl alcohol | 1.42E-02 | 1.42E-02 | 30.4 | 46.6 | 36.1 | 3.49E-02 | 3.49E-02 | 74.5 | 114 | 88.5 | 0.01 | 0.03 | 1.45 | ||
| 4 | Isobutyl alcohol | 7.01E-03 | 7.01E-03 | 31.8 | 95,136 | 320 | 2.12E-02 | 2.12E-02 | 96.3 | 287,758 | 967 | 0.01 | 75.3 | 15.9 | ||
| 5 | Isopropenylethyl alcohol | 4.86E-03 | 4.86E-03 | 4.86E-03 | 2.41 | 4.47 | 1.71E-02 | 1.71E-02 | 1.71E-02 | 8.48 | 15.7 | 2.22E-03 | 0.26 | |||
| 6 | 3-Methyl-1-butanol | 1.09 | 1.28 | 50.7 | 26.9 | 43.3 | 3.91 | 4.61 | 182 | 96.9 | 156 | 0.01 | 0.01 | 0.02 | 0.03 | 2.56 |
| 7 | 2-Methyl-1-butanol | 4.65E-03 | 4.65E-03 | 4.65E-03 | 9.48 | 19.6 | 1.67E-02 | 1.67E-02 | 1.67E-02 | 34.1 | 70.5 | 0.01 | 1.16 | |||
| 8 | n-Pentanol | 4.84E-03 | 4.84E-03 | 4.84E-03 | 0.99 | 0.86 | 1.74E-02 | 1.74E-02 | 1.74E-02 | 3.57 | 3.10 | 9.33E-04 | 0.05 | |||
| 9 | 1-Chloro-2-propanol | 20.0 | 80.3 | 8.91E-03 | 8.91E-03 | 8.91E-03 | 77.0 | 309 | 3.42E-02 | 3.42E-02 | 3.42E-02 | 0.11 | 0.53 | |||
| 10 | n-Hexanol | 0.52 | 3.34E-03 | 1.16 | 0.15 | 1.08 | 2.17 | 1.39E-02 | 4.83 | 0.63 | 4.51 | 3.16E-03 | 6.61E-04 | 1.65E-04 | 0.07 | |
| 11 | Linalool | 5.14 | 5.08 | 1.17E-03 | 1.17E-03 | 1.17E-03 | 32.4 | 32.0 | 7.34E-03 | 7.34E-03 | 7.34E-03 | 0.05 | 0.05 | |||
|
| ||||||||||||||||
| ΣConcentration or its RC (alcohol) | 137 | 356 | 1,049 | 379,781 | 4,651 | 0.20 | 0.61 | 0.14 | 99.4 | 76.4 | ||||||
|
| ||||||||||||||||
| C. Aldehyde | ||||||||||||||||
| 1 | Acetaldehyde | 1,618 | 1,646 | 10,584 | 730 | 540 | 2,909 | 2,959 | 19,035 | 1313 | 971 | 4.24 | 5.06 | 2.61 | 0.34 | 16.0 |
| 2 | Allyl aldehyde (Acrolein) | 8.24E-02 | 8.24E-02 | 8.24E-02 | 5.08 | 6.90 | 1.89E-01 | 1.89E-01 | 1.89E-01 | 11.6 | 15.8 | 3.04E-03 | 0.26 | |||
| 3 | Methylacryl aldehyde | 1.59E-02 | 1.59E-02 | 1.59E-02 | 1.80 | 3.33 | 4.54E-02 | 4.54E-02 | 4.54E-02 | 5.14 | 9.52 | 1.34E-03 | 0.16 | |||
| 4 | Isobutyraldehyde | 1.46E-02 | 1.46E-02 | 1.46E-02 | 0.24 | 3.80 | 4.30E-02 | 4.30E-02 | 4.30E-02 | 0.71 | 11.2 | 1.85E-04 | 0.18 | |||
| 5 | Isovaleraldehyde | 8.52E-03 | 8.52E-03 | 8.52E-03 | 1.03 | 2.45 | 2.99E-02 | 2.99E-02 | 2.99E-02 | 3.60 | 8.62 | 9.43E-04 | 0.14 | |||
|
| ||||||||||||||||
| ΣConcentration or its RC (aldehyde) | 2,909 | 2,959 | 19,035 | 1,334 | 1,016 | 4.24 | 5.06 | 2.61 | 0.35 | 16.7 | ||||||
|
| ||||||||||||||||
| D. Ketone | ||||||||||||||||
| 1 | Acetone | 2,514 | 3,131 | 224 | 7.35 | 28.0 | 5,960 | 7,422 | 532 | 17.4 | 66.5 | 8.69 | 12.7 | 0.07 | 4.56E-03 | 1.09 |
| 2 | Methyl ethyl ketone | 1.38E-02 | 1.38E-02 | 1.38E-02 | 1.15 | 1.35 | 4.05E-02 | 4.05E-02 | 4.05E-02 | 3.39 | 3.96 | 8.86E-04 | 0.07 | |||
| 3 | Methyl n-propyl ketone | 54.0 | 47.1 | 7.55E-03 | 7.55E-03 | 7.55E-03 | 190 | 165 | 2.66E-02 | 2.66E-02 | 2.66E-02 | 0.28 | 0.28 | |||
| 4 | Methyl Isobutyl Ketone | 4.62 | 7.50 | 1.11 | 4.11E-03 | 4.11E-03 | 18.9 | 30.7 | 4.53 | 1.68E-02 | 1.68E-02 | 0.03 | 0.05 | 6.19E-04 | ||
| 5 | Methyl amyl ketone | 5.64 | 6.52 | 3.23E-03 | 0.51 | 0.61 | 26.3 | 30.4 | 1.50E-02 | 2.36 | 2.85 | 0.04 | 0.05 | 6.18E-04 | 0.05 | |
|
| ||||||||||||||||
| ΣConcentration or its RC (ketone) | 6,195 | 7,649 | 536 | 23.2 | 73.3 | 9.04 | 13.1 | 0.07 | 6.06E-03 | 1.20 | ||||||
|
| ||||||||||||||||
| E. Fatty acid | ||||||||||||||||
| 1 | Acetic acid | 2,519 | 1,918 | 1,761 | 210 | 86.3 | 6,177 | 4,703 | 4,319 | 514 | 212 | 9.01 | 8.04 | 0.59 | 1.35E-01 | 3.48 |
| 2 | 2-PROPYNOIC ACID | 69.6 | 2.35E-02 | 2.35E-02 | 2.35E-02 | 2.35E-02 | 199.3 | 6.71E-02 | 6.71E-02 | 6.71E-02 | 6.71E-02 | 0.29 | ||||
|
| ||||||||||||||||
| ΣConcentration or its RC (fatty acid) | 6,376 | 4,703 | 4,319 | 514 | 212 | 9.30 | 8.04 | 0.59 | 1.35E-01 | 3.48 | ||||||
|
| ||||||||||||||||
| E. etc. | ||||||||||||||||
| 1 | n-Pentane | 12.1 | 6.63E-03 | 6.63E-03 | 0.29 | 2.20 | 35.7 | 1.95E-02 | 1.95E-02 | 0.86 | 6.48 | 0.05 | 2.26E-04 | 0.11 | ||
| 2 | Ethyl ether | 7.28E-03 | 7.28E-03 | 0.70 | 0.41 | 1.45 | 2.20E-02 | 2.20E-02 | 2.12 | 1.23 | 4.38 | 2.90E-04 | 3.21E-04 | 0.07 | ||
| 3 | 1,3-Hexadiene | 25.0 | 1.77 | 4.55E-03 | 4.55E-03 | 4.55E-03 | 83.9 | 5.94 | 1.53E-02 | 1.53E-02 | 1.53E-02 | 0.12 | 0.01 | |||
| 4 | n-Hexane | 1.21 | 1.02 | 1.02 | 4.33E-03 | 8.03 | 4.27 | 3.60 | 3.57 | 1.52E-02 | 28.2 | 0.01 | 0.01 | 4.89E-04 | 0.46 | |
| 5 | Toluene | 3.14E-03 | 3.14E-03 | 3.14E-03 | 3.14E-03 | 2.48 | 1.18E-02 | 1.18E-02 | 1.18E-02 | 1.18E-02 | 9.32 | 0.15 | ||||
| 6 | Styrene | 10.0 | 12.0 | 19.4 | 3.03 | 1.09 | 42.7 | 51.0 | 82.5 | 12.9 | 4.64 | 0.06 | 0.09 | 0.01 | 3.36E-03 | 0.08 |
| 7 | 2,5-Dimethyl-4-methoxy-3(2H)-furanone | 1.42 | 1.96E-03 | 1.96E-03 | 2.66 | 0.88 | 8.23 | 1.14E-02 | 1.14E-02 | 15.5 | 5.08 | 0.01 | 4.04E-03 | 0.08 | ||
|
| ||||||||||||||||
| ΣConcentration or its RC (etc) | 175 | 60.5 | 88.2 | 30.4 | 58.1 | 0.25 | 0.10 | 0.01 | 0.01 | 0.96 | ||||||
|
| ||||||||||||||||
| ΣConcentration or its RC (all) | 68,139 | 58,281 | 730,144 | 382,209 | 6,055 | 99.4 | 99.6 | 99.9 | 99.99 | 99.5 | ||||||
a
RC = [Mass concentration (‘i’th compound) / mass concentration (sum) at a given exp day] s100
b
Values below detection limit (BDL) are underlined (calculated as method detection limit)