Osmometer 5520 Vapro Vapor Pressure

The Vapro osmometer is an advanced electronic adaptation of the hygrometric method of vapor pressure determination. The sensitive thermocouple and sophisticated electronics provide the means to measure the dew point temperature depression of a specimen with resolution to 0.00031 °C.  Vapor pressure and freezing point are among the colligative properties of a solution. Compared with pure solvent, these properties are altered in proportion to the number of solute particles dissolved in each kilogram of solvent (water in the case of biological solutions).  Thus, measuring either property is an indirect means of determining solution concentration or osmolality.

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Hultz Hall
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Acquisition Date: 
January 11, 2010