ISO 4934:2003

Name: ISO 4934:2003 — Steel and iron — Determination of sulfur content — Gravimetric method
SKU: ISO 4934:2003
Price: 18000 RUB
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Steel and iron — Determination of sulfur content — Gravimetric method

Название (английский):

ISO 4934:2003

Steel and iron — Determination of sulfur content — Gravimetric method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 10
Дата публикации:: 9 декабря 2003 г.
Издание:: ISO IS 4934 edition 2 version 1
ICS:: 77.080.01

Тип поставки:

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Язык документа:

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Срок поставки:2 раб. дн. (перевод)

Цена:18 000 ₽

Описание (английский):

ISO 4934:2003 specifies a gravimetric method for the determination of the sulfur content in steels and iron, excluding steels containing selenium. The method is particularly suitable as a reference method for the standardization of samples on which certified standard values are to be established. The method is applicable to a sulfur content between 0,003 % (mass fraction) and 0,35 %(mass fraction).

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 4934:2003 - Steel and iron - Determination of sulfur content - Gravimetric method specifies a laboratory gravimetric procedure for accurately measuring sulfur content in steels and iron (excluding steels containing selenium). The method is designed as a reference method suitable for standardizing samples and establishing certified reference values. Applicable sulfur range: 0.003 % to 0.35 % (mass fraction). Key elements include chemical dissolution, chromatographic separation, and gravimetric precipitation and weighing of sulfate as barium sulfate.

Key Topics

Scope and limitations

Applicable to steels and iron, excluding selenium-containing steels.
Recommended as a reference method for certified material standardization.

Analytical principle

Dissolution of test portion in dilute nitric acid with bromine or in nitric/hydrochloric acid (aqua regia) with bromine.
Oxidative treatment with perchloric acid and removal of interfering dehydrated oxides.
Addition of a measured sulfate spike to aid quantitation.
Chromatographic adsorption on an alumina column to separate sulfate from matrix interferences; elution with ammonium hydroxide.
Precipitation of sulfate as barium sulfate, followed by filtering, washing, ignition (heating) and gravimetric weighing.

Reagents and apparatus

Use of analytical-grade reagents and grade 2 water (ISO 3696).
Specific items include an Allihn condenser, alumina-packed adsorption column, analytical balance and standard glassware.

Sampling and test portion

Sampling and sample preparation in accordance with ISO 14284.
Test portion mass chosen according to expected sulfur content to meet method range and sensitivity.

Quality and precision

The standard references ISO 5725 series for method accuracy, repeatability and reproducibility.

Applications

Laboratories and national metrology institutes using ISO 4934:2003 for certified reference material preparation and interlaboratory comparisons.

Industrial quality-control and materials testing in steel production, foundries and metallurgy labs where accurate sulfur determination is required for specification compliance.

Regulatory and compliance testing where traceable, gravimetric sulfur analysis is needed for product certification, failure analysis or material qualification.

Related Standards

ISO 14284 - Sampling and preparation of samples for chemical composition

ISO 3696 - Water for analytical laboratory use

ISO 565 - Test sieves (alumina particle sizing)

ISO 5725 (Parts 1–3) - Accuracy (trueness and precision) of measurement methods

Keywords: ISO 4934:2003, sulfur content determination, gravimetric method, steel sulfur analysis, chromatographic separation, barium sulfate precipitation, reference method.

ISO 4934:2003

Abstract

Похожие стандарты

Overview

Key Topics

Applications

Related Standards

Технические детали

BS EN ISO 3696:1995

Water for analytical laboratory use. Specification and test methods.

BS EN ISO 14284:2022

Steel and iron. Sampling and preparation of samples for the determination of chemical composition.

ISO 5725-1:2023

Accuracy (trueness and precision) of measurement methods and results — Part 1: General principles and definit…

BS ISO 5658-4:2001

Reaction to fire tests. Spread of flame - Intermediate-scale test of vertical spread of flame with vertically…