Astm D 5070 – 90 (Reapproved 1997) pdf free download

Standard Test Method for
Synthetic Quaternary Ammonium Salts in Fabric Softeners
by Potentiometric Titrations1

This standard is issued under the fixed designation D 5070; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of the last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

1. Scope

1.1 This test method describes a potentiometric titration
procedure for the determination of quaternary ammonium salts
in fabric softeners. This test method is intended for the analysis
of known quaternary ammonium salts such as the dialkyl
dimethyl quaternary ammonium compound type and the diamidoamine-based quaternary ammonium compound type.

1.2 The quaternary ammonium salts conform to the structures shown in Fig. 1 and Fig. 2.

1.3 The analytical procedure appears in the following order:
Apparatus 5
Reagents 6
Preparation of standard reagents 7
Standardization of hyaline solution 9
Safety precautions 8
Procedure for determination of dialkyl dimethyl quaternary 10
Procedure for determination of amidoamine-based quaternary 11

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.

2. Referenced Documents

2.1 ASTM Standards:
D 459 Terminology Relating to Soaps and Other Detergents2
D 1193 Specification for Reagent Water3
D 1681 Test Method for Synthetic Anionic Active Ingredient in Detergents by Cationic Titration Procedure2
D 3049 Test Method for Synthetic Anionic Ingredient by
Cationic Titration2
E 180 Practice for Determining the Precision of ASTM
Methods for Analysis and Testing of Industrial Chemicals4

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