Hi, everyone in the polymer-inorganic salt aqueous two phase system, the volumes of top phase decreases and bottom volume increases with the rise of temperature, so can you tell me what is the reason, or mechnism of this phenomenon, thank everybody!
It is possible that the inorganic salt solution dissolves more into the polymer phase as the temperature increases. Hence, one phase shrinks and other phase swells in volume.
Hope this helps answer your question.
Professor Yehia Khalil
Yale University
USA
Also the hydrophobic effect increases with temperature. This will translate in a higher interaction between PEG molecules thus reducing the occupied volume.
For a discussion on the effect of the temperature on some aqueous two-phase systems, where one of the phases is a dextran solution, you may check: Boris Y. Zaslavsky, "Aqueous Two-Phase Partitioning ─ Physical Chemistry and Bioanalytical Applications", Marcel Dekker, New York, 1995, pp. 99-103.
- Badges
- Science topic
- Similar topics
- Engineering
- Chemical Engineering