"Applejack" Technique: New Application of an Old Approach to Solute Concentration

Science  19 Apr 1963:
Vol. 140, Issue 3564, pp. 292
DOI: 10.1126/science.140.3564.292


Freezing and slow thawing is a simple and inexpensive means for preparing concentrated solutions from large volumes of water-soluble compounds. Particularly appropriate for colored compounds, it can be adapted easily to colorless solutes for which quantitative tests are available.