ASTM-D3049 2003

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D3049-89(2003) Standard Test Method for Synthetic Anionic Ingredient by Cationic Titration

Published By	Publication Date	Number of Pages
ASTM	2003	4

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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.

1.3 The analytical procedures appear in the following order:

1.4 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. A precautionary statement appears in Section 7. Material Safety Data Sheets are available for reagents and materials. Review them for hazards prior to usage.

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Summary of Test Method Significance and Use Interferences
2	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

	Sections
Primary Standard	8
General Procedure for Anionic-Active Material	12
Reagents	6
Standardization of Hyamine Solution	11
Purity	8.2
Preparation of Hyamine Solution	10
Preparation of Mixed Indicator Solution	9
Free Acid or Alkali	8.4
Alcohols	8.3
ICS Codes	71.100.40 - Surface active agents

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ASTM-D3049 2003

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