Small browser-based tools for HPLC and lab work.
Estimates how much mobile phase you need to prepare for a run sequence.
Estimates column void volume and dead time from geometry, flow and porosity.
C1V1 = C2V2 — stock volume for a target concentration, made up to volume in a volumetric flask.
C1 and C2 must use the same unit (e.g. both mg/mL or both mM).
Given two premixed channels (e.g. MeOH/water), find the pump ratio that hits a target composition. Example: Channel A 50:50, Channel B 30:70, target 40:60 → enter 50, 30, 40.
Build a time program between two %B points — start, end, duration and number of steps — outputs a ready-to-use table.
| Time (min) | %B | %A |
|---|