ASTM-D3049 2009

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D3049-89(2009) Standard Test Method for Synthetic Anionic Ingredient by Cationic Titration

Published By	Publication Date	Number of Pages
ASTM	2009	5

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Categories: 71.100.40 - Surface active agents, ASTM

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Description

1.1 This test method covers the determination of the amount of synthetic anionic ingredient in a surfactant by direct titration with a standardized cationic reagent. The test method is a simple and convenient means for the quantitative estimation of the anionic material. The end point is detected by the transfer of a colored complex from an organic solvent phase to an aqueous phase. The colored complex is formed by the addition of a solution of dye to a solution of the anionic surfactant. This complex is soluble in the organic-solvent phase and insoluble in the aqueous phase. When this solution is titrated with a standardized solution of a cationic reagent, the dye is displaced from the colored complex and, being water-soluble, migrates to the aqueous phase. Therefore, a cationic titrating solution that has been standardized against a characterized anionic agent can be used to analyze for other anionics of known molecular mass.

1.2 This test method is applicable to alkylaryl sulfonates, alkyl sulfonates, alkyl sulfates and hydroxy-sulfates, alkylphenol- and fatty alcohol ethoxy-sulfates and dialkylsulfosuccinates. It applies to active materials containing one hydrophilic group per molecule.

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PDF Pages	PDF Title
1	Scope Referenced Documents Summary of Test Method Significance and Use
2	Interferences Reagents Safety Precaution Primary Standard
3	Preparation of the Mixed Indicator Solution Preparation of 0.004 M Hyamine 1622 Solution Standardization of Hyamine 1622 Solution
4	General Procedure for Anionic-Active Material Report Precision and Bias Keywords TABLE 1

Additional information

Standard Title	D3049-89(2009) Standard Test Method for Synthetic Anionic Ingredient by Cationic Titration
Published Code	ASTM
Publication Date	2009
Pages Count	5
ICS Codes	71.100.40 - Surface active agents

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ASTM-D3049 2009

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