ISO 14378:2009 PDF

Name: ISO 14378:2009 — Milk and dried milk — Determination of iodide content — Method using high-performance liquid chromatography
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Milk and dried milk — Determination of iodide content — Method using high-performance liquid chromatography

Название (английский):

ISO 14378:2009

Milk and dried milk — Determination of iodide content — Method using high-performance liquid chromatography

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 9
Дата публикации:: 24 сентября 2009 г.
Издание:: ISO IS 14378 edition 2 version 1
ICS:: 67.100.10

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Описание (английский):

ISO 14378|IDF 167:2009 specifies a high-performance liquid chromatographic (HPLC) method for the determination of the iodide content of pasteurized whole milk and dried skimmed milk, when present at levels from 0,03 µg/g to 1 µg/g and 0,3 µg/g to 10,0 µg/g, respectively.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 14378:2009 (IDF 167:2009) specifies a validated high-performance liquid chromatography (HPLC) method for the determination of iodide content in pasteurized whole milk and dried skimmed milk. The standard covers measurement ranges of 0.03–1 µg/g for pasteurized whole milk and 0.3–10.0 µg/g for dried skimmed milk. The method is intended for the quantitative determination of free (ionic) iodide using reverse‑phase ion‑pair HPLC with electrochemical detection.

Key topics and requirements

Scope and analyte: Measurement of ionic iodide in milk and milk powder within the stated ranges; note that 5–10% of total iodide can be organically bound in fresh, high‑quality samples.

Principle: Dilute sample, remove insoluble/high‑molecular‑mass material by filtration through a 25 000 D cut‑off membrane, separate iodide by reverse‑phase ion‑pair HPLC and detect with an electrochemical detector using a silver working electrode (0–+50 mV).

Reagents and eluent: Analytical/HPLC‑grade reagents including acetonitrile, hexadecyltrimethylammonium chloride (ion‑pair reagent), disodium hydrogen phosphate; eluent is acetonitrile/water (68+32 v/v) with ion‑pairing salt, pH 6.8.

Standards and calibration: Prepare iodide stock and working standards; build a calibration graph by linear least‑squares (exclude zero); required correlation coefficient ≥ 0.99.

Apparatus and conditions: Typical HPLC setup-pump (≈2 ml/min), injector (50–200 µl), C‑18 analytical column (e.g., 4.7 × 110 mm, 5 µm), optional guard column, electrochemical detector (d.c. or pulsed amperometric mode). Sample clean‑up uses centrifugation with membrane filter cones or disposable ultrafiltration units.

Quality and safety notes: Protect iodide solutions from light; follow laboratory safety and ISO water quality (ISO 3696) for analytical use.

Applications and users

ISO 14378:2009 is used for:

Dairy quality control to monitor iodide levels in milk and milk powder.

Regulatory and compliance testing where iodine/nutrient levels are regulated or labelled.

Food safety and nutrition analysis in public health and research programs.

Method development and validation in analytical chemistry laboratories focused on trace halides.

Typical users:

Dairy industry laboratories and quality managers

Accredited food testing and contract laboratories

Regulatory agencies monitoring iodine in food

Academic and research laboratories studying micronutrients in dairy

Related standards

ISO 3696 - Water for analytical laboratory use (required water quality)

ISO 707 | IDF 50 - Recommended sampling method for milk and milk products (referenced)

Keywords: ISO 14378:2009, iodide determination, HPLC, milk analysis, dried milk, ion‑pair chromatography, electrochemical detector, dairy laboratory, iodine in milk.

ISO 14378:2009 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

Технические детали

SIST EN ISO 3696:1998

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

SIST EN ISO 707:2009

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

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