Freezing Point Osmometry
Easy and fast determination of the osmolality of various aqueous solutions.
The KNAUER freezing point osmometer K-7400S
The K-7400S Semi-Micro Osmometer can determine the exact freezing point of aqueous solutions.
KNAUER is one of the pioneers in the field of osmometry and known for its reliable and user-friendly instruments for many decades.
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Sample volume
50–150 µl
Resolution
1 mOsmol/kg
Test time
~ 2 min
Osmolality range
0–2000 mOsmol/kg
Precision
SD ≤ 4 mOsmol/kg [0–400 mOsmol/kg], RSD ≤ 1 % [400–2 000 mOsmol/kg]
Linearity
± 1 % [0–1 500 mOsmol/kg]
± 1.5 % [0–2 000 mOsmol/kg]
What is the advantage?
Fast & easy determination of osmolality of various aqueous solutions.
Freezing Point Osmometry
The measurement principle of the K-7400S Semi-Micro Osmometer is based on the colligative property of freezing point depression. If a solute is added to a liquid this results in a decreased freezing point of the solution. The depression is 1,858 K per 1 mole of ideally solved compound in one liter of water.
This effect depends only on the number of particles in the liquid and not on the physical or chemical properties of the solutes. Due to this linear correlation, the osmolality of a sample can be determined by precisely measuring its freezing point.
Change settings more easily
Visualization of the measurement
User-friendly interface
EuroOsmo 7400 software
