Appendix - Mathematical Formulas
Mathematical formulas
| Parameter | EP/USP/JP | USP until 12/2022 | JP until 3/2006 |
|---|---|---|---|
| Plate Numberi/ Efficiencyi | |||
| Assymetryi | |||
| Symmetryi/ Tailingi | |||
| Capacityi | |||
| Eff/li | |||
| HETPi | |||
| Resolutioni | |||
Formula for parameter calculation
where:
Description of symbols
| Symbol | Description | Symbol | Description |
|---|---|---|---|
| RTi | - Component retention time | bi | - Right half-width at 10% height |
| Wh/2i | - width at half height | A05i | - Left half-width at 5% height |
| Wi | - Baseline width | B05i | - Right half-width at 5% height |
| ai | - Left half-width at 10% height | TM | - Retention time of the unretained solute. |
RSD [%]
Percentage standard deviation (variation coefficient).
where:
Description of symbols
| Symbol | Description |
|---|---|
| n | number of validated (loaded) chromatograms |
| Xi | the value of a monitored parameter of the i-th chromatogram |
| arithmetic mean of a monitored parameter of all validated (loaded) chromatograms |