Reference number
ISO 660:2020
© ISO 2026
International Standard
ISO 660:2020
Animal and vegetable fats and oils — Determination of acid value and acidity
Edition 4
2020-03
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Published (Edition 4, 2020)
This publication was last reviewed and confirmed in 2025. Therefore this version remains current.

ISO 660:2020

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CHF 67
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Abstract

This document specifies three methods (two titrimetric and one potentiometric) for the determination of acidity in animal and vegetable fats and oils, hereinafter referred to as "fats". The acidity is expressed preferably as acid value or, alternatively, as acidity calculated conventionally.

This document is applicable to refined and crude vegetable or animal fats and oils, soap stock fatty acids or technical fatty acids. It does not apply to waxes.

Since the methods are completely non-specific, they do not apply to differentiating between mineral acids, free fatty acids and other organic acids. The acid value, therefore, includes any mineral acids that are present.

Milk and milk products (or fat coming from milk and milk products) are excluded from the Scope of this document.

General information

  • Status
     : Published
    Publication date
     : 2020-03
    Stage
    : International Standard confirmed [90.93]
  • Edition
     : 4
    Number of pages
     : 12
  • Technical Committee :
    ISO/TC 34/SC 11
    ICS :
    67.200.10 
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