Table 3.
Standard curve and concentrations of aroma-active and key off-flavor compounds in TW.
| No. | Key Flavor Compounds a | FD | Quantitative Ion (m/z) | Standard Curve | R 2 b | Concentration (μg/L) c | Recovery (%) | RSD (%) d |
|---|---|---|---|---|---|---|---|---|
| 1 | (E)-2-octenal * | >81 | 108.2, 83.1, 70.1 | y = 0.6813x + 0.1175 | 0.9995 | 654.47 | 126 | 4.94 |
| 2 | (E,Z)-2,6-nonadienal * | >81 | 109.1, 70.1, 67.1 | y = 0.8418x + 0.0274 | 0.9934 | 459.54 | 112 | 4.86 |
| 3 | (E)-2-heptenal # | 81 | 112.0, 83.1, 70.1 | y = 0.2955x + 0.0183 | 0.9959 | 1090.23 | 111 | 6.08 |
| 4 | Decanal # | 81 | 209.0, 193.0, 70.1 | y = 0.2869x - 0.0088 | 0.9921 | 93.37 | 99 | 0.23 |
| 5 | Octanol # | 81 | 96.9, 84.1, 69.0 | y = 0.5663x + 0.0091 | 0.9992 | 259.1 | 82 | 6.04 |
| 6 | (E,Z)-2,6-nonadienol * | 81 | 122.2, 81.0, 69.1 | y = 0.4322x - 0.0065 | 0.9928 | 825.18 | 87 | 7.83 |
| 7 | diisopropyl disulfide # | 81 | 150.1, 108.0, 66.0 | y = 2.2337x + 0.6887 | 0.9974 | 2122.17 | 72 | 0.99 |
| 8 | Hexanol # | 81 | 134.1, 119.0, 56.2 | y = 0.8208x + 0.0072 | 0.9985 | 18.68 | 98 | 8.97 |
| 9 | (E)-2-nonenal * | 27 | 122.0, 83.1, 70.1 | y = 0.8483x + 0.1171 | 0.9919 | 597.69 | 114 | 5.79 |
| 10 | (E)-2-decenal # | 27 | 136.0, 83.1, 70.1 | y = 0.6988x + 0.1383 | 0.9929 | 293.72 | 121 | 7.34 |
| 11 | Nonanol * | 27 | 182.0, 70.1, 50.1 | y = 1.2630x + 0.0130 | 0.9983 | 17.77 | 77 | 8.71 |
| 12 | (E)-2-octenol # | 3 | 146.8, 81.1, 57.2 | y = 0.2583x + 0.0231 | 0.9939 | 16.73 | 109 | 0 |
a “*” means they were the aroma-active compounds; “#” means they were the key off-flavor compounds; b correlation coefficient of standard curve; c average concentration of triplicate experiments; d relative standard deviation.