ISO 3656:2011 PDF
Animal and vegetable fats and oils — Determination of ultraviolet absorbance expressed as specific UV extinction
Animal and vegetable fats and oils — Determination of ultraviolet absorbance expressed as specific UV extinction
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 8
- Дата публикации:
- 13 января 2011 г.
- Издание:
- ISO IS 3656 edition 4 version 1
- ICS:
- 67.200.10
ISO 3656:2011 specifies a method for the determination of the absorbance at ultraviolet wavelengths of animal and vegetable fats and oils.
Abstract
Overview
ISO 3656:2011 - "Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction" specifies a standardized spectrophotometric method to measure UV absorbance of fats and oils. The standard defines how to prepare test solutions, which solvents and wavelengths to use, and how to calculate specific extinction (K values) to assess oil quality, refinement and oxidation. The method is widely used for quality control, authenticity testing and regulatory compliance in the edible oil and fats sector.
Key topics and technical requirements
- Scope: Measurement of UV absorbance for animal and vegetable fats and oils to express results as specific UV extinction (K232, K268, K270).
- Wavelengths & solvents:
- Use isooctane (2,2,4‑trimethylpentane) for K232 and K268.
- Use cyclohexane for K232 and K270.
- Solvents must have low inherent UV absorbance (e.g.,
Технические детали
- Технический комитет
- ISO/TC 34/SC 11 - Animal and vegetable fats and oils
- SKU
- ISO 3656:2011
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