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Osmomat 050
Measurement Method
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The colloid-osmotic pressure is measured by means of an osmotic cell. The lower half of the osmotic cell is closed off to the environment and is filled with electrolyte-containing Ringer's solution.
The upper half of the cell is open to the environment and is filled with a colloid-containing solution.
The two halves of the cell are separated from each other by a semipermeable membrane.
This membrane possesses defined pores through which only water and electrolyte molecules can permeate.
Due to the osmotic pressure differential of the two solutions, solvent permeates from the lower into the upper half of the measuring cell until an equilibrium is reached between the underpressure in the lower half of the cell and the osmolal concentration of the colloids.
An electronic pressure measuring system, which is mounted into the lower half of the cell, transduces the underpressure into an electric signal, which is shown on a digital display. |
© 2004 gonotec GmbH - Impressum
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