ISO 8070:2007 PDF

Name: ISO 8070:2007 — Milk and milk products — Determination of calcium, sodium, potassium and magnesium contents — Atomic absorption spectrometric method
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Milk and milk products — Determination of calcium, sodium, potassium and magnesium contents — Atomic absorption spectrometric method

Название (английский):

ISO 8070:2007

Milk and milk products — Determination of calcium, sodium, potassium and magnesium contents — Atomic absorption spectrometric method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 14
Дата публикации:: 6 августа 2007 г.
Издание:: ISO IS 8070 edition 2 version 1
ICS:: 67.100.10

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Описание (английский):

ISO 8070│IDF 119:2007 specifies a flame atomic absorption spectrometric method for the determination of calcium, sodium, potassium and magnesium contents in milk and milk products. The method is applicable for milk and whey, buttermilk, yogurt, cream, dried milk, butter, cheese, casein and caseinate.

Abstract

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Стандарты, упомянутые в описании

Overview

ISO 8070:2007 (IDF 119:2007) specifies a flame atomic absorption spectrometric (AAS) method for determining the contents of calcium, sodium, potassium and magnesium in milk and milk products. The standard applies to a wide range of matrices including milk, whey, buttermilk, yogurt, cream, dried milk, butter, cheese, casein and caseinate. It was prepared jointly by ISO and the International Dairy Federation (IDF) and replaces earlier editions.

Key topics

Analytical principle: organic matter is decomposed (dry ashing or wet digestion) and the resulting solution is measured by flame AAS; test and calibration solutions are atomized into an air–acetylene flame and absorbance is read at element-specific wavelengths.

Target elements & wavelengths:

Calcium: 422.7 nm
Sodium: 589.6 nm
Potassium: 766.5 nm
Magnesium: 285.2 nm

Sample decomposition options:

Dry ashing in a programmable furnace
Wet digestion (open or pressurized microwave-assisted systems or PTFE vessels)

Reagents & standards: nitric acid (concentrated and diluted), lanthanum trichloride solution, hydrogen peroxide, and commercially available ion stock solutions; preparation of a multi-element working standard is described.

Apparatus requirements: flame AAS with air–acetylene burner, specified pipettes and volumetric flasks, crucibles, microwave digestion systems, ovens, centrifuge and other laboratory equipment.

Quality control & performance: procedures for preparation of test samples, calibration, calculation and expression of results, and sections on precision (repeatability and reproducibility) and test reporting.

Applications

Routine quality control and compositional analysis in dairy processing plants and testing laboratories.

Regulatory compliance testing and nutrient labelling verification for milk and milk products.

Research and development in dairy science where reliable quantification of Ca, Na, K and Mg is required.

Method transfer and validation in contract analytical laboratories performing mineral analysis by atomic absorption spectrometry.

ISO 8070:2007 PDF

Abstract

Похожие стандарты

Overview

Key topics

Applications

Who should use this standard

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