Table 1. Mass Spectrometry Conditions, Multiple Reaction Monitoring (MRM) Settings (MW, Molecular Weight; m/z, Mass to Charge Ratio; ms, Millisecond; V, Volt).
| compound | time window (min) | isotope | MW derivate | precursor ion (m/z) | product ion (m/z) | dwell time (ms) | collision energy (V) |
|---|---|---|---|---|---|---|---|
| glyoxylate | 9–13 | M | 231 | 174.1 | 146 | 50 | 5 |
| M+1 | 232 | 175.1 | 147 | 50 | 5 | ||
| M+2 | 233 | 176.1 | 148 | 50 | 5 | ||
| glycolate | 13–16 | M | 304 | 247.1 | 73 | 50 | 10 |
| M+1 | 305 | 248.1 | 73 | 50 | 10 | ||
| oxalate | 16–20 | M | 318 | 261.2 | 147 | 50 | 10 |
| M+1 | 319 | 262.2 | 147 | 50 | 10 | ||
| M+2 | 320 | 263.2 | 147 | 50 | 10 |