TABLE 2.
Identification of chemical components and their contents in three citrus extracts by UPLC-ESI-MS/MS.
| No. | RT (min) | Molecular formula | Positive ions (m/z) | Fragment ions (m/z) | Negative ions (m/z) | Fragment ions (m/z) | Identification | Content (mg 100 g-1 DW) |
|---|---|---|---|---|---|---|---|---|
| S1 | ||||||||
| 1 | 3.3178 | C21H32O10 | 445.2187 | 467.1893, 265.1445, 247.1314 | 443.1901 | nd | Dihydrophaseic acid glycosyl ester | 1.97 ± 0.14 |
| 2 | 4.2213 | C27H30O15 | 595.1665 | 617.1469, 577.1532, 457.1110 | 593.1524 | 473.1103, 353.0698 | Vicenin-2 | 4.97 ± 0.31 |
| 3 | 4.8459 | C27H30O15 | 595.1665 | 449.1093, 431.0971, 329.0669 | 593.1507 | 473.1014, 429.0885 | Luteolin-C-neohesperidoside | 5.56 ± 0.39 |
| 4 | 5.9939 | C27H30O14 | 579.1705 | 601.1522, 561.2428, 433.1092 | 577.1556 | 413.0849, 293.0426 | Apigenin-8-C-neohesperidoside | 6.91 ± 0.41 |
| 5 | 6.5680 | C27H34O15 | 599.1971 | 637.1476, 621.1797, 581.1865, 563.1739 | 597.1828 | 579.1685, 477.1409, 459.1304, 417.1201 | 3′,5′-di-C-glucopyranosylphloretin | 177.07 ± 8.50 |
| 6 | 7.3563 | C28H32O15 | 609.1814 | 631.1648, 463.1245, 301.1400 | 607.1678 | nd | Diosmin | 1.86 ± 0.05 |
| 7 | 8.4774 | C28H32O14 | 593.1863 | 615.1710, 447.1297, 429.1195 | 591.1705 | 427.1095, 307.0609, 119.0348 | Acacetin-8-C-neohesperidoside | 10.14 ± 0.67 |
| 8 | 9.1024 | C28H32O14 | 593.1863 | 615.1710, 447.1297, 413.2165, 285.0749 | 591.1718 | 471.1347, 427.1095, 307.0609, 119.0348 | Acacetin-6-C-neohesperidoside | 2.56 ± 0.11 |
| 9 | 10.0328 | C28H34O14 | 595.2015 | 617.1825, 475.3274 | 593.1891 | 639.1917 | Poncirin | 8.39 ± 0.66 |
| 10 | 10.7518 | C26H30O8 | 471.2007 | 493.1815, 409.1956 | 469.1893 | 515.1918 | Limonin | 0.24 ± 0.01 |
| 11 | 12.1480 | C28H32O14 | 593.1863 | 615.1710 | 591.1705 | 637.1790 | Acacetin-7-O-neohesperidoside | 7.31 ± 0.56 |
| 12 | 12.9932 | C26H32O9 | 489.2131 | 511.1935 | 487.1975 | nd | Ichangin | 0.69 ± 0.05 |
| S2 | ||||||||
| 1 | 3.8668 | C27H30O15 | 595.1604 | 577.1506, 559.1432, 379.1026, 295.0585 | 593.1552 | 575.1548, 503.1236, 473.1113, 297.0821 | Vicenin-2 | 0.49 ± 0.02 |
| 2 | 8.2927 | C27H30O14 | 579.1640 | 433.1226, 271.0569 | 577.1625 | 413.1364, 269.0465 | Rhoifolin | 0.57 ± 0.02 |
| 3 | 10.1582 | C15H10O5 | 271.0575 | 153.0182, 119.0203, 91.0126 | 269.0476 | 227.0379, 151.0231, 107.0411 | Apigenin | 0.53 ± 0.04 |
| 4 | 16.2302 | C27H32O14 | 581.1848 | 527.1632, 383.1061, 273.0724, 195.0269 | 579.1782 | 459.1205, 313.1028, 151.0035, 119.0856 | Narirutin | 1.91 ± 0.12 |
| 5 | 16.5880 | C27H32O14 | 581.1808 | 435.1426, 419.1300, 315.0869, 273.0725 | 579.1755 | 459.1173, 373.0950, 271.0605, 193.0628 | Naringin | 37.12 ± 1.56 |
| 6 | 17.1923 | C15H12O5 | 273.0734 | 153.0171, 147.0433, 123.0510, 119.0486 | 271.0606 | 177.0187, 151.0029, 119.0501, 107.0147 | Naringenin | 3.31 ± 0.21 |
| 7 | 18.3808 | C28H32O16 | 625.1724 | 607.1573, 487.1167, 439.1033, 317.0643 | 623.1686 | 533.1122, 503.1242, 383.0800, 312.0662 | Diosmetin-6,8-di-C-glucoside | 1.91 ± 0.15 |
| 8 | 21.0718 | C28H32O15 | 609.1778 | 301.0677, 286.0449 | 607.1754 | 299.0580, 284.0338 | Neodiosmin | 8.04 ± 0.39 |
| 9 | 26.6731 | C27H32O15 | 597.1753 | 579.1625, 451.1230, 235.0622, 147.0524 | 595.1723 | 475.1138, 431.1033, 287.0576, 166.9979 | Eriocitrin | 1.77 ± 0.07 |
| S3 | ||||||||
| 1 | 2.8202 | C16H18O9 | 355.1576 | 163.0379, 145.0578, 135.0458 | 353.1024 | 191.1868, 93.1285, 85.1035 | Chlorogenic acid | 1.88 ± 0.24 |
| 2 | 3.0150 | C10H10O4 | 195.1578 | 177.1575,145.3658 | 193.0505 | 160.8440, 133.0289, 118.9376 | Ferulic acid | 5.32 ± 0.69 |
| 3 | 6.6144 | C27H30O15 | 595.1487 | 287.5831, 309.5481 | 593.2026 | 285.0158, 309.0551, 338.03967, 351.0848 | Kaempferol rutinoside | 14.32 ± 0.86 |
| 4 | 7.4411 | C27H32O14 | 581.1880 | 383.1131, 273.0763 | 579.1792 | 459.1174, 271.0624 | Naringin | 6.45 ± 0.39 |
| 5 | 8.3179 | C28H34O15 | 611.1888 | 303.1578 | 609.1866 | 301.1072, 286.0481 | Hesperidin | 3.26 ± 0.16 |
| 6 | 8.4279 | C28H34O15 | 611.1980 | 413.1249, 303.0873 | 609.1876 | 301.1154, 286.3236 | Neohesperidin | 38.67 ± 5.41 |
| 7 | 16.3182 | C20H20O7 | 373.1289 | 357.0979, 343.0816, 329.0872, 153.0187 | 371.1287 | 355.0548, 329.1575 | Sinensetin | 0.93 ± 0.13 |
| 8 | 17.4459 | C21H24O8 | 405.1556 | 241.0716, 226.0485, 211.0248, 183.0296 | 403.1548 | 241.0186, 226.0587 | Citromitin | 9.85 ± 0.59 |
| 9 | 18.5421 | C21H22O8 | 403.1392 | 388.1147, 373.0914, 355.0815, 327.0852 | 401.0248 | 386.2486, 371.5786, 325.454 | Nobiletin | 41.18 ± 2.88 |
| 10 | 18.7703 | C19H18O8 | 375.1081 | 360.0849, 345.0609, 330.0381, 327.0508 | 373.7557 | 358.1575, 343.1574 | Ternatin | 0.86 ± 0.04 |
| 11 | 19.2460 | C22H24O9 | 433.1508 | 418.1268, 403.1024, 388.0804, 345.0617 | 431.1832 | 415.1482, 401.1548, 386.0548 | 3-methoxynobiletin | 2.79 ± 0.33 |
| 12 | 19.6596 | C20H20O7 | 373.1280 | 358.1040, 343.0804, 328.0575, 300.0628 | 371.1576 | 341.15743, 326.4578 | Tangeretin | 29.01 ± 3.48 |
| 13 | 20.7832 | C20H20O8 | 389.1232 | 374.1004, 359.0763, 341.0658, 197.0086 | 387.1258 | 357.0546, 338.1547 | 5-demethylnobiletin | 5.82 ± 0.70 |
| 14 | 22.0453 | C19H18O7 | 359.1135 | 344.0898, 329.0655, 311.0553, 197.0084 | 357.0547 | 342.1584, 327.5823,309.1552 | 5-hydroxy-7,8,3′,4′-tetramethoxyflavone | 0.25 ± 0.03 |