osmometer

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osmometer

[äz′mäm·əd·ər]
(analytical chemistry)
A device for measuring molecular weights by measuring the osmotic pressure exerted by solvent molecules diffusing through a semipermeable membrane.
References in periodicals archive ?
Osmometers were buried downstream of the matric suction sensors, as shown in Figures 4 and 5 (S: osmometer, Z: matric suction sensor, and T: soil pressure gauge).
Additionally, according to the osmometer data, the water stayed in a stable state, while in the dry soil, due to the limited precision of the instrument, measurements showed microfluctuations.
It quickly became clear that students would have some set-up problems, such as leaking osmometer stems or difficulty filling the osmometer properly - issues that must be solved as a group.
During this time, the quantity of solution in the osmometer stem steadily changes and students record movement with the stem in millimeters per hour.
Some other methods based on the pressure microsensors and osmometers have also been developed.
We then quantify this effect for a hypothetical plant that behaves like a perfect osmometer.
an imaginary plant or a perfect osmometer), the osmotic head of the soil solution counts in full and is additive to the matric head.
Mesogleal fluid from both bell and tentacles was drawn into calibrated hemocrit tubes and osmotic pressure determined using a Wescor 5500 vapor pressure osmometer. Osmotic pressure was also measured in the corresponding samples of external media.
It is important to note that as the pressures in the osmometers were increasing, some solution moves up the tube connecting the osmometer to the pressure transducer.
Membrane Osmometer Line offers analytical labs a precise and reliable system for the measurement of the average molecular weight Mn of polymers, soluble in aqueous or organic solvents.