ISO 10539:2002 PDF

Name: ISO 10539:2002 — Animal and vegetable fats and oils — Determination of alkalinity
SKU: ISO 10539:2002
Price: 25 EUR
Availability: InStock

Animal and vegetable fats and oils — Determination of alkalinity

Название (английский):

ISO 10539:2002

Animal and vegetable fats and oils — Determination of alkalinity

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 6
Дата публикации:: 14 марта 2002 г.
Издание:: ISO IS 10539 edition 1 version 1
ICS:: 67.200.10

Тип поставки:

Full version90 €Read online 24h10 €Read online 72h15 €

Язык документа:

ruen

Срок поставки:1 раб. дн. (перевод)

Цена:90 €

Описание (английский):

La présente Norme internationale spécifie une méthode pour la détermination de l'alcalinité des corps gras d'origines animale et végétale sans faire de distinction entre leurs différents constituants. Cette méthode n'est pas applicable aux corps gras présentant une acidité supérieure à 60 % (fraction massique) déterminée conformément à l'ISO 660 et ne permet pas de déterminer si les corps gras fondus solides ont été traités avec des solutions caustiques.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 10539:2002 specifies a standardized laboratory method for the determination of alkalinity in animal and vegetable fats and oils. The method measures the proportion of alkali (reported as milligrams of oleate per kilogram or as a mass fraction of sodium hydroxide) by titration after dissolving the sample in a heated acetone/water mixture. The standard excludes fats with acidity greater than 60% (by ISO 660) and does not detect whether solid fats have been caustically treated.

Key topics and requirements

Principle: dissolve the test portion in an acetone/water solution (with bromophenol blue indicator), heat, allow phase separation and titrate the acetone layer with standardized HCl.

Reagents:

Laboratory-grade water (ISO 3696, grade 3)
Acetone/water indicator solution (acetone, water, bromophenol blue; alkalized with NaOH 0.1 mol·L–1 then back-titrated with HCl 0.1 mol·L–1)
Titrant: HCl standardized to c = 0.01 mol·L–1 (fresh within 7 days)

Apparatus: borosilicate glassware for acetone solution, 400–500 mL wide-neck conical flasks, magnetic stirrer and heated plate recommended, burette for titration.

Sample mass: sample sizes vary by expected alkalinity and sample colour (typically 1 g to 40 g; larger masses for low expected alkalinity or light-coloured fats).

Result expression: alkalinity may be calculated as:

Mass fraction of NaOH (A): A = (4 · V · c) / m
Oleate content (S, mg/kg): S = (V · c · 304 000) / m where V = volume of HCl (mL), c = molarity of HCl (mol·L–1), m = sample mass (g).

Repeatability and reproducibility: Annex A reports interlaboratory trial data and provides r/R values and statistical guidance per ISO 5725.

Applications and users

ISO 10539:2002 is used by:

Food and edible oil testing laboratories for quality control and specification compliance

Oilseed processors, refiners and manufacturers of animal/vegetable fats

Regulatory and conformity assessment bodies verifying product purity

Analytical chemists developing or validating methods involving alkali residues

Practical uses include detecting residual soaps or basic contaminants in fats and oils, supporting refining process control and product release decisions.

Related standards

ISO 660 - Determination of acid value and acidity

ISO 661 - Sample preparation for analysis of fats and oils

ISO 5555 - Sampling of fats and oils

ISO 3696 - Water for laboratory use

ISO 5725 - Method accuracy (repeatability and reproducibility)

Keywords: ISO 10539:2002, alkalinity determination, animal and vegetable fats and oils, titration, acetone/water, HCl titration, oleate mg/kg, laboratory method.

ISO 10539:2002 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

Технические детали

SIST EN ISO 6603-2:2023

Plastics - Determination of puncture impact behaviour of rigid plastics - Part 2: Instrumented impact testing…

SIST EN ISO 3696:1998

Water for analytical laboratory use - Specification and test methods (ISO 3696:1987)

ISO 5725-6:1994/Cor 1:2001

Accuracy (trueness and precision) of measurement methods and results — Part 6: Use in practice of accuracy va…

ISO 6614:1994/Amd 1:2019

Petroleum products — Determination of water separability of petroleum oils and synthetic fluids — Amendment 1

ISO 5555:2001/Amd 1:2014

Animal and vegetable fats and oils — Sampling — Amendment 1: Flexitanks