Steam pressure osmometer OSMOMAT 070 (dew point osmometer)

NegotiableUpdate on 05/01

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Nature of the Manufacturer: Producers

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Overview

The vapor pressure osmometer OSMOMAT 070 (dew point osmometer) $r $n is connected to two electric heating regulators for different measurements and suspended in a constant temperature measuring cell filled with saturated vapor of solvent. The initial surface of the measuring probe Z is covered with solvent droplets, so there is no temperature difference between them. Replacing a solvent droplet on the surface of a probe with a solution droplet can cause solvent vapor condensation due to the lower solvent vapor pressure on the solution surface. The condensation release causes the temperature of the solution droplets to increase, while also leading to an increase in vapor pressure. When the saturated vapor on the surface of the measuring cell and solution droplets reaches pressure equilibrium, the solution droplets reach a relatively stable state

Product Details

Product Information

Measurement principle:
Two electric heating regulators connected for different measurements are suspended in a constant temperature measuring cell filled with saturated vapor of solvent. The initial surface of the measuring probe is covered with solvent droplets, so there is no temperature difference between them. Replacing a solvent droplet on the surface of a probe with a solution droplet can cause solvent vapor condensation due to the lower solvent vapor pressure on the solution surface. The condensation release causes the temperature of the solution droplets to increase, while also leading to an increase in vapor pressure. When the saturated vapor on the surface of the measuring cell and solution droplets reaches pressure equilibrium, the solution droplets reach a relatively stable temperature, which ultimately leads to a difference in temperature between the two probes, and the temperature difference is directly converted into a voltage signal. The measured value is proportional to the osmotic concentration of the solution.
Due to the nonlinear behavior of osmotic pressure and concentration in polymer solutions, it is necessary to measure solutions with at least three concentration gradients. Calculate measurement results using statistical methods such as linear regression.
◆OSMOMAT 070Application of vapor pressure osmometer:
Suitable for determining the average molecular weight of polymers dissolved in different organic solvents and the osmotic pressure of aqueous solutions. The measurement range is40-50000g/molOrganic solubility

Product Model

parameter/model	OSMOMAT 070	OSMOMAT 090
measurement range	Zui low measurement concentration:3.3 x 10-5 Mol/kg(Toluene)1.7 x 10-4 Mol/kg(Water)	Zui small detection pressure0.1 mmSolvent column
Molecular weight range	Toluene:50 - 50.000Dalton water:　50 - 5.000Dalton	5000－2.000.000Dalton, (depending on the chosen semi permeable membrane)
sample volume	about1 ml/Each solution should have at least3A solution (a solution with a molar concentration gradient)	Measurement pool volume: approximately5ml Sample volume of polymer solution: at least3Each solution2ml(with concentration gradient)1—5%Scope)
Measuring principle	Measure the vapor pressure of the sample:Less than the solvent used0.1%
calibration material	Diphenylethanone/Diphenylethyl alcohol/Naphthalene, with a molar concentration of0.1—1.5Osmol/kg（water）or1 x 10-3—3 x 10-2（organic solution）
Probe for measuring two temperature ranges	Paired insertion (water and organic solution)
Membrane diameter		40mm
solvent		Various organic solvents, water, and electrolyte solutions containing water
analog output	1mV/Number, the largest10V
temperature adjustment	1℃scale	1℃scale
temperature range	High room temperature5oC－130oC	High room temperature5oC－130oC
size（HXD）	260x320x230mm	260x320x230mm
weight	approximately9.3kg	approximately10kg
power supply	180VA	180VA