ISO-6387 › Surface active agents -- Determination of the power to disperse calcium soap -- Acidimetric method (Modified Schoenfeldt method)

ISO-6387 - 1ST EDITION - CURRENT


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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.

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Document Number

ISO 6387:1983

Revision Level

1ST EDITION

Status

Current

Publication Date

Feb. 1, 1983

Committee Number

ISO TC 91