ISO 729:1988 PDF
Oilseeds — Determination of acidity of oils
Oilseeds — Determination of acidity of oils
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 3
- Дата публикации:
- 27 октября 1988 г.
- Издание:
- ISO IS 729 edition 2 version 1
- ICS:
- 67.200.20
The method consists in dissolving in a mixture of diethyl ether and ethanol of the oil extracted for the determination of the "oil contend" of the seeds (see ISO 659), and then titrating of the free fatty acids present using an ethanolic potassium hydroxide solution. It is not applicable to cotton seeds with adherent cotton linters, or to palm or olive fruits.
Abstract
Overview
ISO 729:1988 specifies a laboratory method for the determination of the , expressed preferably as an (mg KOH/g) or alternatively as a (% by mass). The method applies to oil extracted from seeds (extraction per ) and is based on dissolving the extracted oil in a diethyl ether/ethanol mixture and titrating free fatty acids with an solution. The standard excludes cottonseed with adherent linters and is not applicable to oil palm or olive fruits; its use with lauric-rich oils (copra, palm kernel) is problematic.
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