International Standard
ISO 4325:1990
Soaps and detergents — Determination of chelating agent content — Titrimetric method
Reference number
ISO 4325:1990
ISO 4325:1990
Edición 2
1990-04
1990-04
© ISO 2024
International Standard
p
ISO 4325:1990
10198
No disponible en español
Publicado
(Edición 2, 1990)
Esta norma se revisó y confirmó por última vez en 2022.
Por lo tanto, esta versión es la actual.
Resumen
A test portion of the sample is dissolved in water, the pH of the solution adjusted to 4.65 and the solution titrated against standard copper(II) sulphate solution using 1-(2-pyridylazo)-2-naphthol as indicator. Principally the method has been designed principally for determining ethylenediaminetetraacetic acid (EDTA) and it salts. Before determining other chelating agents, or determining ethylenediaminetetraacetic acid in the presence of other chelating agents, the applicability of the method should be confirmed.
Ciclo de vida
-
Anteriormente
RetiradaISO 4325:1977
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Ahora
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