Table 2.
Retention time (Rt), MS-MS fragments of important ions present in the mass spectra of seven flavonols degraded products in boiling water via UPLC-Q-tof-MS.
| Compounds | Rt (min) | Molecular [M-H]- | MS-MS fragment |
|---|---|---|---|
| Myricetin in 100 °C water | |||
| A1 | 1.08 | 169.0218 | 169.0335, 151.0199, 125.0394, 107.0280, 97.0427 |
| A2 | 1.83 | 169.0214 | 169.0312, 151.0196, 125.0365, 107.0277, 83.0263 |
| A3 | 3.79 | 333.0300 | 287.0475, 259.0468, 253.0421, 207.0115, 125.0385 |
| A4 | 4.94 | 153.0264 | 153.0350, 151.0196, 107.0270 |
| Not identified | 6.75 | 301.0041 | 301.0213, 273.0239, 245.0290, 229.0335, 201.0374, |
| Myricetin | 7.02 | 317.0371 | 317.0535, 289.0568, 271.0453, 227.0546, 193.0314, |
| Not identified | 8.13 | 343.0146 | 343.0325, 325.0217, 315.0358, 299.0407, 287.0403, 269.0296, 229.0333, 151.0194 |
| A5 | 8.62 | 331.0142 | 287.0406, 259.0452, 215.0531, 187.0581 |
| Kaempferol in 100 °C water | |||
| B1 | 0.85 | 125.0328 | 97.0553, 83.0464, 77.0204 |
| B2 | 1.09 | 169.0222 | 153.0353, 151.0208, 125.0423, 107.0289, 83.0283 |
| B3 | 1.79 | 169.0223 | 169.0316, 151.0206, 125.0396, 107.0285, 83.0278 |
| B4 | 3.44 | 137.0329 | 111.0259, 93.0484, 75.0389 |
| B5 | 5.10 | 153.0275 | 153.0222, 151.0083, 125.0318 |
| B6 | 6.61 | 409.0604 | 393.0736, 363.0708, 319.0810, 298.0355, 257.0653, 243.0527, 277.0541, 211.0621, 151.0200, 107.0279 |
| B7 | 6.96 | 467.0638 | 449.0705, 405.0871, 377.0896, 337.0966, 297.0615, 285.0610, 269.0682, 253.0714, 181.0209, 137.0403, |
| Kaempferol | 8.33 | 285.0504 | 285.0622, 255.0509, 239.0547, 227.0545, 211.0589, 187.0580, 159.0617, 143.0661, 117.0497 |
| Not identified | 9.23 | 569.0735 | 551.0902, 499.0782, 405.0862, 311.0419, 257.0656, 239.0547, 151.0201 |
| Galangin in 100 °C water | |||
| C1 | 0.87 | 125.0322 | 117.0021, 83.0279, 57.0460 |
| C2 | 1.09 | 169.0200 | 151.0169, 125.0362, 107.0261, 83.0253 |
| C3 | 1.83 | 169.0168 | 169.0279, 151.0172, 125.0372, 107.0266, 83.0258 |
| C4 | 2.37 | 121.0372 | No data obtained |
| C5 | 5.05 | 153.0269 | 151.0169, 125.0506, 107.0236 |
| C6 | 9.21 | 393.0533 | 377.0792, 321.0912, 269.0609, 169.0789, 123.0214 |
| Galangin | 9.57 | 269.055 | 269.0657, 252.0582, 227.0502, 197.0753, 169.0799, |
| C7 | 10.29 | 451.0570 | 435.0387, 385.0263, 269.0604, 255.0695, 169.0276, 163.0170, 151.0165, 137.0376 |
| Fisetin in 100 °C water | |||
| D1 | 0.70 | 183.0386 | 137.0413, 121.0454, 109.0447, 93.0491 |
| D2 | 1.12 | 181.0232 | 135.0257, 109.0451, 91.0334 |
| D3 | 2.16 | 153.0288 | 153.0326, 109.0424, 91.0208, 81.0466 |
| D4 | 3.31 | 269.0526 | 269.0691, 241.0730, 225.0770, 197.0805, 183.0640 |
| D5 | 4.30 | 153.0288 | 153.0334, 109.0420, 67.0287 |
| D6 | 5.31 | 137.0336 | 137.0412, 135.0259, 109.0449, 91.0339 |
| D7 | 6.16 | 301.0190 | 301.0515, 285.0951, 271.0404, 255.0466, 277.0501, 211.0566, 201.0689, 183.0592, 151.0163 |
| D8 | 6.85 | 273.0477 | 257.0535, 197.0442, 163.0207, 135.0261, 109.0454, |
| Fisetin | 7.35 | 285.0588 | 285.0652, 257.0687, 229.0728, 163.0225, 135.0263, 121.0461, 91.0337 |
| D9 | 7.60 | 283.0232 | 283.0491, 255.0527, 277.0566, 211.0607, 182.0646, 171.0639, 147.0265, 135.026, 119.0303, 91.0337 |
| Myricitrin in 100 °C water | |||
| E1 | 0.88 | 125.0312 | 83.0230 |
| E2 | 1.12 | 169.0219 | 151.0188, 107.0223, 83.0281 |
| E3 | 1.90 | 169.0221 | 151.0114, 125.0369, 107.0236, 83.0259 |
| Not identified | 3.66 | 355.0718 | 355.0827, 309.0769, 153.0246, 83.0295 |
| E4 | 5.29 | 469.0733 | 453.0736, 421.0406, 381.0408, 327.0260, 319.0400, 267.0326, 179.0078, 151.0188, 125.0405 |
| E5 | 6.04 | 455.0768 | 39.0960, 423.0494, 407.0341, 393.0391, 287.0299 |
| Myricitrin | 6.70 | 463.0931 | 445.0908, 317.0420, 271.0381, 179.0105, 151.0151 |
| Not identified | 6.94 | 509.0780 | 417.0436, 333.0132, 317.0474, 301.0462, 271.0330, |
| Not identified | 8.18 | 733.0981 | 587.0588, 475.1033, 393.0396, 307.0349 |
| Quercitrin in 100 °C water | |||
| F1 | 5.28 | 445.0815 | 445.0968, 415.0592, 299.0359, 221.0310 |
| F2 | 6.03 | 445.0823 | 299.0346, 271.0384, 227.0472, 197.0065 |
| Quercitrin | 7.17 | 447.1078 | 447.0257, 373.0764, 301.0518, 271.0414, 255.0460, |
| F3 | 8.22 | 453.0981 | 375.0719, 301.0504, 285.0567, 271.0390, 223.0270 |
| Rutin in 100 °C water | |||
| G1 | 4.72 | 607.1331 | 581.0595, 453.1035, 299.0438, 171.9053 |
| G2 | 6.13 | 607.1141 | 601.0953, 583.0806, 419.0679, 301.0570, 151.0197 |
| G3 | 6.36 | 607.1290 | 607.1645, 315.0381, 301.0576, 287.0422, 151.0198 |
| Rutin | 6.71 | 609.1500 | 609.1802, 373.0816, 343.0704, 301.0581, 271.0464, |
| G4 | 7.13 | 607.1299 | 607.1656, 443.0902, 317.0535, 259.0462, 151.0201 |