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Mass spectrum parameters and linear coefficients of the compounds.
| Compound | Precursor ion (m/z) | Product ion (m/z) | dwell time (ms) | DP (eV) | CE (eV) | Peak points | linear equation | R2 | Concentration range (μg/mL) | LLOQ (μg/mL) |
|---|---|---|---|---|---|---|---|---|---|---|
| Colistin A | 585.6 | 101.1 | 50 | 120 | 33.5 | 15 | y = 0.000808x + 0.00701 | 0.9961 | 0.10–10 | 0.10 |
| Colistin B | 578.6 | 101.1 | 50 | 115 | 33.5 | 15 | y = 0.000948x + 0.01864 | 0.9951 | 0.10–10 | 0.10 |
| IS | 595.6 | 101.1 | 40 | 150 | 32 | 15 | NA | |||
