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
Edition 1
International Standard
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ISO 6387:1983
Published (Edition 1, 1983)
This standard was last reviewed and confirmed in 2019. Therefore this version remains current.

ISO 6387:1983

ISO 6387:1983
CHF 42
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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.

General information

  •  : Published
     : 1983-02
    : International Standard under systematic review [90.20]
  •  : 1
     : 3
  • ISO/TC 91
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