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TM168-TM 168 Chelating Agents: Polyaminopolycarboxylic Acids; Copper PAN Method

TM168-TM 168 Chelating Agents: Polyaminopolycarboxylic Acids; Copper PAN Method

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TEST METHODS ARE DELIVERED AS A LINK IN YOUR EMAILED RECEIPT.

 

AATCC TM168-2018, Chelating Agents: Active Ingredient Content of Polyaminopolycarboxylic Acids and their Salts: Copper PAN Method

 

Developed in 1987 by AATCC Committee RR90 (Revised 2018, with title change)

 

1.  Purpose and Scope

 

1.1  This test method is an alternate to AATCC Method 149, Chelating Agents: Chelation Value of Aminopolycarboxylic Acids and Their Salts; Calcium Oxalate Method.

1.2  The active content of ethylenefiaminetetraacetic acid (EDTA), N-hydroxyethylenediaminetriacetic acid (HEDTA) and diethylenetriaminepentaacetic acid (DTPA) and their salts is usually expressed by the calcium chelation value (CaCV).   Titration with calcium salt using either oxalate or a dye indicator, as done in AATCC Method 149, yields a value which includes partially substituted EDTA, HEDTA, DTPA, nitrilotriacetic acid (NTA), iminodiacteic acid (IDA), glycolate and other weak chelating agents found in some commercial products.  This alternative procedure excludes the effect of partially substituted products, providing a more stringent value.

 

Copyright 2018 American Association of Textile Chemists and Colorists, RTP, NC, USA. All rights reserved.

 

The above information is only a summary of the AATCC test method.


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