ISO 5931:2000 PDF

Name: ISO 5931:2000 — Carbonaceous materials used in the production of aluminium — Calcined coke and calcined carbon products — Determination of total sulfur by the Eschka method
SKU: ISO 5931:2000
Price: 25 EUR
Availability: InStock

Carbonaceous materials used in the production of aluminium — Calcined coke and calcined carbon products — Determination of total sulfur by the Eschka method

Название (английский):

ISO 5931:2000

Carbonaceous materials used in the production of aluminium — Calcined coke and calcined carbon products — Determination of total sulfur by the Eschka method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 7
Дата публикации:: 24 августа 2000 г.
Издание:: ISO IS 5931 edition 1 version 1
ICS:: 71.100.10

Тип поставки:

Full version105 €Read online 24h10 €Read online 72h15 €

Язык документа:

ruen

Срок поставки:2 раб. дн. (перевод)

Цена:105 €

Описание (английский):

This International Standard specifies a reference method for determining the total sulfur content of calcined coke and calcined carbon products by the Eschka method, provided that they contain a minimum of by mass and preferably less than by mass of sulfur.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 5931:2000 specifies a reference method for the determination of total sulfur in calcined coke and calcined carbon products used in the production of aluminium. The method is the classical Eschka method, intended for materials that contain at least 0.1% (mass) sulfur and preferably less than 4% (mass). ISO 5931:2000 is used as a benchmark for laboratory measurements and for validating faster instrumental methods.

Key topics and requirements

Scope and sample: Applies to calcined coke and calcined carbon products for the aluminium industry. Test sample preparation follows ISO 6375 principles and results are reported on an air-dried basis.

Eschka mixture: Prepared from 2 parts light calcined magnesium oxide to 1 part anhydrous sodium (or potassium) carbonate, passed through a 212 µm sieve.

Test portion: Two duplicate portions of 1 g are analysed; results are reported as the mean to the nearest 0.1% by mass.

Ignition and conversion: Test portion mixed with Eschka mixture, ignited in a muffle furnace at 800 ± 25 °C (at least 3 h) to convert sulfur to sulfate.

Extraction and precipitation: Sulfate extracted with hydrochloric acid, then precipitated as barium sulfate using barium chloride; final determination is gravimetric (weighing BaSO4).

Precision: Repeatability limit 0.05% (absolute); reproducibility limit 0.10% (absolute).

Quality controls: Includes a blank run, use of duplicate determinations, and specified reagent and apparatus quality (e.g., platinum/silica/glazed porcelain crucibles, Gooch crucibles, specified glassware standards).

Applications and users

ISO 5931:2000 is primarily used by:

Laboratory analysts and QC personnel in the aluminium smelting and carbon materials industry.

Manufacturers of calcined coke and calcined carbon products for product certification and internal quality control.

Testing laboratories that require a reference method to validate faster instrumental techniques (e.g., combustion analysers) for total sulfur determination.

Regulatory and procurement teams needing reproducible, comparable sulfur measurements for process control, furnace feedstock specification, and material conformity.

Practical benefits include standardized sample handling, robust gravimetric endpoint (barium sulfate), and accepted precision limits that support traceable reporting and method comparison.

Related standards

ISO 6375:1980 - Sampling of coke for aluminium electrodes (sample preparation)

ISO 4787 / ISO 4788 - Laboratory volumetric glassware and measuring cylinders

ISO 5725 - Precision of measurement methods

ISO 1170 - Converting results to moisture bases

Keywords: ISO 5931:2000, Eschka method, calcined coke, calcined carbon products, total sulfur determination, aluminium industry, barium sulfate gravimetric.

ISO 5931:2000 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

Технические детали

ISO 6375:1980

Carbonaceous materials for the production of aluminium — Coke for electrodes — Sampling

SIST EN ISO 4787:2022

Laboratory glass and plastic ware - Volumetric instruments - Methods for testing of capacity and for use (ISO…

SIST EN ISO 4788:2005

Laboratory glassware - Graduated measuring cylinders (ISO 4788:2005)

ISO 5725-6:1994/Cor 1:2001

Accuracy (trueness and precision) of measurement methods and results — Part 6: Use in practice of accuracy va…

SIST EN ISO 11704:2019

Water quality - Gross alpha and gross beta activity - Test method using liquid scintillation counting (ISO 11…