osmometry
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Introduction
Measurement of osmolality. As osmotically active particles are added to a solution increasing its osmolality, 4 other properties of the solution are altered:
- osmotic pressure is increased
- boiling point is increased
- freezing point is depressed
- vapor pressure is depressed These are called colligative properties of the solution because they can be related to each other & to osmolality. Osmometry is based upon measuring colligative properties of solutions that change with variations in solute concentrations. Freezing point depression osmometry is the most commonly used method.
More general terms
Additional terms
References
- ↑ Clinical Diagnosis & Management by Laboratory Methods, 19th edition, J.B. Henry (ed), W.B. Saunders Co., Philadelphia, PA. 1996, pg 61