Separating Non-Volatile or Thermally Fragile Compounds
A mixture contains compounds that can't be vaporized without decomposing, so a separation technique that never requires heating the sample into the gas phase is needed.
References
- Tswett, M.S. "Physikalisch-Chemische Studien." Berichte der Deutschen Botanischen Gesellschaft 24 (1906): 316–323.