Table 3.
Overview of the rules for each method.
| Method | Elemental limits | Filter rules | Selection rules | Cited | References |
|---|---|---|---|---|---|
| Formularity | C, H, O, N, S, P | Chemical rules | Lower of heteroatoms, Lower errors | 173 | Tolic et al.9 |
| TRFU/FuJHA | C, N, S, P, H/C, O/C | Chemical rules, DBE-O limit | Lower black carbon, Lower of heteroatoms, Lower errors | 114 | Fu et al.10 |
| ICBM-OCEAN | C, H, O, N, S, P | NSP ruler, separate filter | Homologous sequence | 83 | Merder et al.12 |
| MFAssignR | O, N, S, P, H/C, O/C | Chemical rules, DBE-O limit, separate filter | Homologous sequence | 69 | Schum et al.11 |
| TEnvR | C, H, O, N, S, P, H/C, O/C | Separate filter | Homologous sequence, simpler MF, lower errors | 8 | Goranov et al.13 |
| NOMspectra | C, H, O, N, S, P | Nitrogen rule*, DBE-O limit | Lower errors | 1 | Volikov et al.14 |
More detailed information about each of the rules among MF assignment methods was shown in Tables S2 and S3. Literature cited as of 2024.9.30. Nitrogen rule* unlike the nitrogen rule, see Table S3 for details.