Dec 272018

Description of the standard. This application note describes the measurement of interfacial tension between oil and water under non- equilibrium conditions. ASTM D Standard Test Method for Interfacial Tension of Oil Against Water by the Ring Method Scope

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Tensiometer Ring used for ASTM D, ASTM D, ASTM D

The measurement is done 60 seconds after the interface between oil and water has been formed. Home Blog Are you d91 for the new transformer oil quality standard?

Home page Products Blog. Our heavy use of petroleum products and the effects of hydrocarbon fluid contamination makes for an almost limitless list of applications that require testing. This standard is used to evaluate hydrocarbon fluids and possible contamination levels.

Scientific Gear is a manufacturer and distributor of scientific laboratory equipment. Damaged tensiometer rings can effect results so examine the rings routinely and handle with care at all times. The popularity of these ASTM methods require users to perform many of these tests day-to-day and in the process find themselves in situations where they either need to have their tensiometer ring repaired or replaced.

Surface tension testing methods do not change when multiple surfactants are included in the mixture.

How many dynes per centimeter can a tensiometer measure? Interfacial tension measurement provides a sensitive method to detect small amounts of soluble polar contaminants and products of oxidation. ASTM D states that it “is also applicable to nonaqueous solutions and mixed solvent solutions.


This will pose some new requirements for your measurement device. Written by Hank Levi. If you do find yourself in a situation where you need a quick repair for your Du Nouy Ring or need to find a replacement let us know. The ASTM D axtm describes the testing procedure that is based on the measurement of interfacial tension at the non-equilibrium conditions. Fri, Nov 30, Here are a few of the more popular ASTM methods relating to surface and interfacial tension: Are you prepared for the new transformer oil quality standard?

ASTM D971 – 12

The latest revision for the ASTM D Standard test method for interfacial tension of oil against water by ring method dates back to To get the latest updates on the progress and information on how to do needed updates, please sign up to our contact list.

It includes water with two or more surfactants added. The test method determines the surface tension of popular substances including diswasher detergents and laundrey soap mixtures in water. Here are a few of the more popular ASTM methods relating to surface and interfacial tension:. Are you ready for the change? Two-phase mixtures include a water and surfactant mixture containing air in the form of foam or bubbles.

Are you prepared for the new transformer oil quality standard? – ASTM D – Technex

ASTM D states “more than asm solute component may be present, including solute components that are not in themselves surface-active. Measure and move forward. ASTM D applies to two-phase mixtures.


Our goal is to work with companies to help them make better products. Microfabricated polymer chips were utilized as tool for biomolecule separation in analytical chemistry. Evaluating hydrocarbon fluid contamination levels is important in numerous industries including transformer oil testing and most Fuels.

The high interfacial tension between new mineral insulating oil and astmm, indicate the absence astn the most unwanted polar contaminants. ASTM D is broken into two separate sections based on the liquid mixture being tested. Home page Products AT Blog. We specialize in Karl Fischer moisture titration, general titration, surface tension, density and thermal applications. These platinum wire accessories while possessing a very high and durable melt-point can be damaged easily due to mishandling.

This allows rather short measurement times but can lead to inaccurate measurements as the surface active species present in the oil doesn’t have time to adsorb at the interface.

In her PhD thesis, she developed fabrication methods for a new type of inorganic-organic polymers. Industrieweg 35 NE Wormerveer Nederland info technex.

There are many ASTM methods companies follow. Copyright Technex Colofon Privacy en cookies. This standard applies to detergents and soaps but also includes emulsifiers asstm surfactants.

Two-phase mixtures include solid particles with the aqueous mixture. The new IEC standard is about the be released to tackle the issue.

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