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AATCC TM168-2018e

AATCC TM168-2018e

$21.45

Test method for chelation value of Polyaminopolycarboxylic acids and their salts: Copper pan

Published By Publication Date Number of Pages
AATCC 2018 3
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Full Description

AATCC 168-2018 is an alternate to AATCC Method 149, Chelating Agents: Chelation Value of Aminopolycarboxylic Acids and Their Salts; Calcium Oxalate Method.

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.

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AATCC TM168-2018e
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