สิ่งทอและเส้นใย
เอกสารมาตรฐาน
สหรัฐอเมริกา
AATCC
TM168
Chelation Value of Polyaminopolycarboxylic Acids and Their Salts: Copper PAN
2018e (2022)
2
Offline
The active ingredient content of ethylenediaminetetraacetic acid (EDTA), N-hydroxyethylethylenediaminetriacetic acid (HEDTA) and diethylenetriaminepentaacetic acid (DTPA) and their salts is usually expressed by the calcium chelation value (CaCV). This value indicates the amount of calcium (as calcium carbonate) which will be chelated by a known weight of chelating agent. This method excludes the effect of partially substituted products.