Gonotec Osmomat 090

Additional information

ADVANTAGE	• High-performance measuring cell • Short response times • Small sample volumes • Highest measuring resolution of 0.1 mm liquid column per digit • Avoids "balloon effects" membrane diameter of 40mm
KEY DATA	– Smallest detectable pressure 0.1 mm solvent column – Molecular weight range 5,000 to 2,000,000 Dalton, lower range depending on the semi-permeable membrane – Measurement cell volume approximately 0.5 mL – Membrane diameter 40 mm – Solvents Various organic solvents, water and aqueous electrolyte solvents – Sample vol. of polymer sol. minimum 3 solutions of 2 mL each (with stepped concentration in the range of 1 to 5%)
MEASUREMENT	Measurement: Membrane osmometer A membrane osmometer consists of an osmotic cell which is located in a cell thermostat. The osmotic cell is divided into two sections by a semipermeable membrane. In the lower section, a hermetically sealed cell which is filled with pure solvent, a precision pressure measuring system is installed. The upper section, which is positioned above the semipermeable membrane, is designed as a meander-shaped channel system with a large surface. A funnel tube and a discharge valve enable rinsing and filling of the cell with solvent or polymer solution. Due to the osmotic pressure difference between solvent and solution, a vacuum, which is related to the concentration of the osmotic actively solute particles, is generated in the lower cell half.

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