Processed databases
Atom-Mass pairs
Outputs for 3,4-DIHYDROXYBENZOIC ACID; EI-B; MS
Database: UNIV. OF OCCUPATIONAL AND ENVIRONMENTAL HEALTH, Tokyo
Entry ID: JP007231
Synonyms: 3,4-DIHYDROXYBENZOIC ACID, PROTOCATECHUIC ACID
Total mass: 154.1199
Formula: H6 C7 O4
Experimental information
MS type: MS
Instrument: HITACHI M-52
Instrument type: EI-B
Ionization: 25 eV
Ionization mode: POSITIVE
CAMP general report:
Acceptable mass threshold: 2.0158Out of range queried mass peaks:
Replicated queried mass peaks: 18.0, 28.0, 44.0, 52.0, 53.0, 57.0, 64.0, 80.0, 81.0, 109.0, 110.0, 138.0, 155.0,
Processing time: 0:00:02.123758
Results for the quried mass "39.0"
| Formula | Mass differences | Num. used protons | Num. required extra protons | Atom names |
| C3 | 0.056 | 3 | 1 | C1,C3,C4 |
| C3 | 0.056 | 3 | 1 | C1,C2,C5 |
| C3 | 0.056 | 3 | 2 | C1,C4,C7 |
| C3 | 0.056 | 3 | 1 | C1,C2,C4 |
| C3 | 0.056 | 3 | 2 | C2,C5,C6 |
| C3 | 0.056 | 3 | 2 | C3,C5,C6 |
| C3 | 0.056 | 3 | 2 | C3,C4,C7 |
| C3 | 0.056 | 3 | 2 | C3,C4,C6 |
| C2O1 | 0.013 | 1 | 0 | C2,C5,O8 |
| C2O1 | 0.013 | 1 | 0 | C3,C6,O9 |
| C2O1 | 0.013 | 1 | 1 | C4,C7,O10 |
| C2O1 | 0.013 | 1 | 0 | C4,C7,O11 |
| C2O1 | 0.013 | 1 | 0 | C5,C6,O9 |
| C2O1 | 0.013 | 1 | 0 | C5,C6,O8 |