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SRPS ISO 6387:1993

Surface active agents — Determination of the power to disperse calcium soap — Acidimetric method (Modified Schoenfeldt method)

Aug 4, 1993
Aug 4, 1993

General information

90.93     Dec 7, 2024

90.20    Oct 15, 2029

ISS

H091

International Standard

71.100.40  

Serbian  

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Scope

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.

Life cycle

NOW

PUBLISHED
SRPS ISO 6387:1993
90.93 Standard confirmed
Dec 7, 2024

Related project

Adopted from ISO 6387:1983