ISO 1066:1975 PDF
Analysis of soaps — Determination of glycerol content — Titrimetric method
Analysis of soaps — Determination of glycerol content — Titrimetric method
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 3
- Дата публикации:
- 1 мая 1975 г.
- Издание:
- ISO IS 1066 edition 1 version 1
- ICS:
- 71.100.40
The determination is carried out in the following way: Decomposition of the soap with sulphuric acid, and extraction of the fatty acids with light petroleum. Oxidation of the glycerol by periodic acid to formic acid and formaldehyde, and titration of the formic acid produced using a pH meter.
Abstract
Overview
ISO 1066:1975 specifies a titrimetric method for determining glycerol content in commercial soaps. The method covers decomposition of soap with sulfuric acid, extraction of fatty acids with light petroleum (petroleum ether), oxidation of glycerol with periodic (metaperiodate) acid to produce formic acid and formaldehyde, and quantification of the resulting formic acid by titration using a pH meter. It applies to soaps with glycerol content ≥ 0.5% (m/m) and excludes formulations containing organic compounds with more than two adjacent hydroxyl groups.
Key topics and technical requirements
- Scope and limits:
- Applicable to commercial soaps with glycerol ≥ 0.5% (m/m).
- For glycerol
Технические детали
- Технический комитет
- ISO/TC 91 - Surface active agents
- SKU
- ISO 1066:1975
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