Percepta: Using predicted ionization and lipophilicity to anticipate LC method modes

Description
Choice of LC mode (reversed‑phase, HILIC, ion‑exchange) often depends on compound polarity and ionization behavior. Percepta predictions can guide which modes are most promising to try.

Solution

1. For each compound, obtain Percepta predictions for:
   • pKa (identify acidic/basic groups).
   • logP and logD at relevant pH values.
   • Overall polarity descriptors (if available).
2. For compounds that are:
   • Neutral or moderately lipophilic at working pH: consider reversed‑phase first.
   • Highly polar or strongly ionized: consider HILIC or ion‑exchange modes.
   • Zwitterionic: evaluate conditions where one charge may dominate to favor a given mode.
3. Use these insights to:
   • Select initial column types and pH ranges for method scouting.
   • Decide if modifiers (ion‑pair reagents, buffers) may be needed.
4. Validate experimentally:
   • Run small scouting sets with different modes based on predictions.
   • Refine direction according to actual chromatographic behavior.
5. Document the rationale tying property predictions to chosen LC development paths.