ISO 13933:2014 PDF

Name: ISO 13933:2014 — Steel and iron — Determination of calcium and magnesium — Inductively coupled plasma atomic emission spectrometric method
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Steel and iron — Determination of calcium and magnesium — Inductively coupled plasma atomic emission spectrometric method

Название (английский):

ISO 13933:2014

Steel and iron — Determination of calcium and magnesium — Inductively coupled plasma atomic emission spectrometric method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 16
Дата публикации:: 11 июля 2014 г.
Издание:: ISO IS 13933 edition 1 version 1
ICS:: 77.080.01

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Описание (английский):

ISO 13933:2014 specifies a method for determination of calcium and magnesium contents in iron, cast iron, steel, and alloyed steel by inductively coupled plasma (ICP) atomic emission spectrometry. The method is applicable to the determination of calcium and magnesium contents (mass fraction) in the range of 0,000 5 % to 0,006 % and 0,000 5 % to 0,20 %, respectively.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 13933:2014 specifies a validated analytical procedure for the determination of calcium (Ca) and magnesium (Mg) in iron, cast iron, steel and alloyed steel using inductively coupled plasma atomic emission spectrometry (ICP‑AES / ICP‑OES). The method covers sample dissolution (acid digestion and fuming), calibration, instrumental criteria and calculation of mass fractions. Applicable measurement ranges are Ca: 0.0005 % to 0.006 % and Mg: 0.0005 % to 0.20 % (mass fraction).

Key technical topics & requirements

Principle: dissolution of a test portion in a mixture of hydrochloric, nitric and hydrofluoric acids with subsequent fuming using perchloric acid; final dilution, optional filtration and nebulization into an ICP spectrometer.

Analytical wavelengths: suggested lines include Ca 393.66 nm and Mg 279.55 nm; choice of wavelength must be verified for sensitivity and interference on each instrument.

Internal standard: recommended yttrium (Y) lines (e.g., Y 371.03 nm or Y 360.07 nm) to correct for instrumental drift and matrix effects; internal standard must be free of interferences in the sample.

Instrument performance criteria:

Bandwidth (resolution) < 0.030 nm for chosen wavelength.
Short‑term precision (RSD) ≤ 1% at 100–1 000× LOD and ≤ 5% at 10–100× LOD.
Calibration linearity: correlation coefficient > 0.999.
Limits: Ca LOD 0.003 mg/L, LOQ 0.010 mg/L; Mg LOD 0.004 mg/L, LOQ 0.014 mg/L (as specified).

Reagents & standards: use analytical‑grade acids, water per ISO 3696, certified Ca/Mg stock and working standards and a low‑contamination pure iron for blanks/checks.

Apparatus: ICP spectrometer (simultaneous or sequential with internal standard capability), PTFE digestion beakers, 0.22 μm PTFE/polycarbonate filters, class A volumetric glassware.

Safety note: perchloric acid fuming poses explosion/health risks; follow lab safety and ventilation requirements.

Practical applications

Routine chemical composition control in steel and cast‑iron production.

Quality assurance and acceptance testing for alloy specifications where low levels of Ca and Mg affect mechanical properties or downstream processing.

Failure analysis and metallurgical investigations where trace Ca/Mg influence inclusion control, solidification or machinability.

Regulatory compliance and third‑party material certification laboratories.

Related standards

ISO 14284 - Sampling and sample preparation for chemical analysis of steels and cast irons

ISO 3696 - Water for analytical laboratory use

ISO 385 / 648 / 1042 - Laboratory volumetric glassware specifications

Keywords: ISO 13933:2014, ICP‑AES, ICP‑OES, calcium determination, magnesium determination, steel analysis, iron analysis, acid digestion, LOD, LOQ, internal standard, yttrium.

ISO 13933:2014 PDF

Abstract

Похожие стандарты

Overview

Key technical topics & requirements

Practical applications

Who should use ISO 13933:2014

Related standards

Технические детали

SIST EN ISO 3696:1998

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

SIST EN ISO 14284:2023

Steel and iron - Sampling and preparation of samples for the determination of chemical composition (ISO 14284…

BS EN ISO 385:2005

Laboratory glassware. Burettes.