ISO 685:1975
Withdrawn
View Superseded by
Analysis of soaps — Determination of total alkali content and total fatty matter content
Hardcopy , PDF
English, French
10-01-1975
04-09-2025
The method consists in decomposition of the soap by a known volume of standard volumetric mineral acid solution, extraction and separation of the liberated fatty matter with light petroleum and determination of a total alkali content by titration of the excess of acid contained in the aqueous phase with a standard volumetric sodium hydroxide solution. After evaporation of the light petroleum from the extract, dissolution of the residue in ethanol and neutralization of the fatty acids with a standard volumetric potassium hydroxide solution. Evaporation of the ethanol and weighing of the soap formed to determine the total fatty matter content.
| Committee |
ISO/TC 91
|
| DevelopmentNote |
Supersedes ISO 455 (04/2001) Also numbered as BS 1715-2.1(1989). (06/2005)
|
| DocumentType |
Standard
|
| Pages |
3
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| SupersededBy | |
| Supersedes |
| Standards | Relationship |
| BS 1715:1963 | Similar to |
| NBN T 63 107 : 1980 | Identical |
| NEN ISO 685 : 1983 | Identical |
| UNE 55907:1985 | Identical |
| BS 1715-1:1991 | Analysis of soaps General introduction, sampling, and test for presence of synthetic anionic-active surface active agents |
| ISO 684:1974 | Analysis of soaps — Determination of total free alkali |
| BS 1715-1:1989 | Analysis of soaps. General introduction, sampling, and test for presence of synthetic anionic-active surface active agents |
| ISO 684:1974 | Analysis of soaps — Determination of total free alkali |
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