International Standard
ISO 6387:1983
Surface active agents — Determination of the power to disperse calcium soap — Acidimetric method (Modified Schoenfeldt method)
Reference number
ISO 6387:1983
ISO 6387:1983
Edición 1
1983-02
1983-02
© ISO 2024
International Standard
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ISO 6387:1983
12721
No disponible en español
Publicado
(Edición 1, 1983)
Esta norma se revisó y confirmó por última vez en 2019.
Por lo tanto, esta versión es la actual.
Resumen
A 0,5 % (m/m) aqueous soap solution is prepared, and after maintaining this at testing temperature for 24 h, an aliquot portion of this solution is taken. This aliquot portion is mixed with a dilute solution of the dispersing agent (surface active agent) and subsequently with a specified volume of water of known calcium hardness. The mixture is maintained for 1 h at the testing temperature and then the calcium soap present in a aliquot portion of the lower layer is titrated with a standard volumetric solution of hydrochloric acid in the presence of bromcresol green as indicator.
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