Table 1 Affiliation of key peaks of EPA.
RT (min) | CAS number | Component name | Chemical formula | Expected mass (Da) | Observed m/z | Mass error (mDa) | Percentage (%) |
|---|---|---|---|---|---|---|---|
27.31 | 2061–64-5 | Ergosterol peroxide | C28H44O3 | 428.32905 | 427.31985 | − 0.51 | 0.799 |
27.40 | 19,254–69-4 | Ergosta-4,6,8(14)22,-tetraen-3-one | C28H40O | 392.30792 | 391.29748 | − 0.71 | 0.3256 |
27.46 | 57–87-4 | Ergosterol | C28H44O | 396.64805 | 395.42196 | − 0.82 | 0.35 |
30.06 | 14,858–07-2 | (22E,24R) -ergosta-7,22-dien-3β,5α,6β-triol | C28H46O3 | 430.34471 | 465.31065 | − 1.45 | 0.158 |