SIST EN ISO 5536:2013 PDF

Name: SIST EN ISO 5536:2013 — Milk fat products - Determination of water content - Karl Fischer method (ISO 5536:2009)
SKU: SIST EN ISO 5536:2013
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Milk fat products - Determination of water content - Karl Fischer method (ISO 5536:2009)

Название (английский):

SIST EN ISO 5536:2013

Milk fat products - Determination of water content - Karl Fischer method (ISO 5536:2009)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 15
Дата публикации:: 7 августа 2013 г.
ICS:: 67.100.10
Технический комитет:: KŽP - Agricultural food products

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Описание (английский):

ISO 5536|IDF 23:2009 specifies a method for the determination of the water content of milk fat products by the Karl Fischer method. The method is applicable to butteroil (anhydrous butteroil, anhydrous butterfat, anhydrous milk fat) with a water content not exceeding 1,0 % mass fraction.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты SIST

Overview

EN ISO 5536:2013 (ISO 5536:2009) specifies the Karl Fischer (KF) method for determining the water content of milk fat products, specifically applicable to butteroil / anhydrous milk fat with water content up to 1.0 % (mass fraction). Adopted by CEN from ISO/IDF, this standard defines reagents, apparatus, procedure and calculation steps for accurate volumetric KF titration of milk fat matrices.

Key topics and requirements

Scope: Analysis of milk fat products (butteroil/anhydrous butterfat) with ≤ 1.0 % water.

Principle: Direct volumetric titration of the test sample with a commercially available, pyridine‑free two‑component KF reagent at approximately 40 °C; water content calculated from reagent volume used.

Reagents:

Two‑component pyridine‑free Karl Fischer reagent (or one‑component titration reagent with methanol as solvent).
Titration component with water equivalent ≈ 2 mg/ml.
1‑Octanol and methanol (methanol water content ≤ 0.05 %).
Water standard (w = 10 mg/g) for calibration of the titration component.

Working medium: Mix equal volumes of solvent component and 1‑octanol (1+1) in the titration vessel (~30 ml recommended).

Apparatus:

Automatic volumetric KF titrator with 5 ml (preferred) or 10 ml burette, double‑jacketed titration vessel and water bath for controlled ~40 °C titrations.
Analytical balance (readability 0.1 mg) and disposable syringes (5 ml or 10 ml).

Key procedural controls:

Determine KF apparatus drift daily (titration without sample) and express drift in mL/min or mg/min.
Establish water equivalent of titration component via five replicate titrations using the water standard; report mean to three decimal places.
Shut-off criterion: typically a 10 s stop delay or stop drift slightly above measured drift.
Sample preparation: mix sample thoroughly at 35–40 °C to disperse water; typical test portion ≈ 5 g. Replicates recommended for accuracy.

Applications and users

Who uses it: dairy quality control laboratories, butteroil producers, food testing laboratories, regulatory agencies and research institutes concerned with milk fat product quality and specification compliance.

Why use it: precise, standardized measurement of low-level water content for product shelf-life assessment, quality control, specification verification, trade and regulatory compliance.

Related standards

ISO 707 | IDF 50 (recommended sampling method for milk and milk products) is referenced for sampling practices.

CEN adoption: EN ISO 5536:2013 is the CEN-endorsed version of ISO 5536:2009.

Keywords: EN ISO 5536:2013, ISO 5536:2009, Karl Fischer, water content, milk fat products, butteroil, KF titration, anhydrous milk fat, dairy laboratory.

SIST EN ISO 5536:2013 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

Технические детали

ISO 5536:2009

Milk fat products — Determination of water content — Karl Fischer method

SIST EN ISO 707:2009

Milk and milk products - Guidance on sampling (ISO 707:2008)

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