Determination of Number Average Molecular Weight of Organic and Water Soluble Polymers by VPO
(Vapor Pressure Osmometry)

Instrumentation: Knauer Vapor Pressure Osmometry

Principle of Operation:
At a given temperature the vapor pressure of a solution is less than that of pure solvent. The solution and the solvent droplets are placed directly on two thermistors arranged in a Wheatstone bridge circuit so that the temperature rise (the solution droplet is heated up by the latent heat of condensation) can be measured very accurately as a function of the bridge imbalance output voltage.

Molecular Weight Range:	Organic Solvent (40 - 35,000 g/mol)
	Aqueous Solvent (up to 10,000 g/mol)

Temperature Range: Room Temperature to 130°C

Turnaround Time: Seven (7) Working Days

Price:	$1,650.00 for the first sample
	$1,100.00 for each additional sample

For samples received at the same time and using the same operating conditions

When submitting samples please remember the following:

We ask for at least 2 grams of material.
(If required we can always return any unused sample)

Please provide Material Safety Data Sheet or other important information regarding your material

Please provide contact information in case we have any questions.
(Sample Submission Form Provided Below)

Sample Submission Form

Please Ship Samples and Columns for Regeneration To:
American Polymer Standards Corporation
8680 Tyler Blvd.
Mentor, OH 44060