Appendix - Mathematical Formulas
Mathematical formulas
| EP/USP | USP until 12/2022 | JP | |
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| Efficiencyi |
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| Assymetryi |
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| Symmetry/ Tailing |
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| Capacityi |
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| Eff/li |
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| HETPi |
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| Resolutioni |
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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 |