ASTM D4251-89(2003)
Standard Test Method for Active Matter in Anionic Surfactants by Potentiometric Titration

Standard No.

ASTM D4251-89(2003)

Release Date

1989

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D4251-89(2009)

Latest

ASTM D4251-89(2016)

Scope

Anionic surfactants are the most widely used of the synthetic detergents. ASTM methods in current use for their determination involve two-phase aqueous/chloroform titrations with the organic dyes methylene blue (Test Method D 1681) or disulphine blue/dimidium bromide (Test Method D 3049) as indicators. One advantage of the potentiometric method is that it eliminates the use of chloroform whose use is restricted for environmental and toxicological reasons.

This test method is intended for use as described in 1.1.

1.1 This test method describes a potentiometric titration procedure for determining the anionic active matter in detergents. It is intended for the analysis of anionic surfactants such as detergent range alkylbenzenesulfonates, 945;-olefin sulfonates, alcohol sulfates, and alcohol ethosulfates. It has not been tested for surfactant formulations.

1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Material Safety Data Sheets are available for reagents and materials. Review them for hazards prior to usage.

ASTM D4251-89(2003) history

• 2016 ASTM D4251-89(2016) Standard Test Method for Active Matter in Anionic Surfactants by Potentiometric Titration
• 1989 ASTM D4251-89(2009) Standard Test Method for Active Matter in Anionic Surfactants by Potentiometric Titration
• 1989 ASTM D4251-89(2003) Standard Test Method for Active Matter in Anionic Surfactants by Potentiometric Titration
• 1995 ASTM D4251-89(1995)e1 Standard Test Method for Active Matter in Anionic Surfactants by Potentiometric Titration