ISO 14720-1:2013 PDF

Testing of ceramic raw and basic materials — Determination of sulfur in powders and granules of non-oxidic ceramic raw and basic materials — Part 1: Infrared measurement methods

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Title (English):

ISO 14720-1:2013

Testing of ceramic raw and basic materials — Determination of sulfur in powders and granules of non-oxidic ceramic raw and basic materials — Part 1: Infrared measurement methods

Document status:: Withdrawn
Format:: Electronic (PDF)
Number of pages:: 9
Publication date:: February 14, 2013
Edition:: ISO IS 14720 edition 1 version 1
ICS:: 81.060.10

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Description (English):

ISO 14720-1:2013 defines a method for the determination of sulfur in powdered and granular non-oxidic ceramic raw materials and materials, such as silicon carbides, silicon nitrides, graphites, carbon blacks, cokes, carbon powders. If proved by the recovery rate, this method can also be applied for other non-metallic powdered and granular materials, e.g. silicon dioxide. ISO 14720-1:2013 is applicable for materials with mass fractions of sulfur from 0,005 % to 2 %. ISO 14720-1:2013 can also be applied for materials with higher mass fractions of sulfur after verification of the particular case.

Technical details

Technical committee: ISO/TC 33 - Refractories
SKU: ISO 14720-1:2013

Abstract

Overview

ISO 14720-1:2013 specifies an infrared measurement method for the determination of sulfur in powdered and granular non-oxidic ceramic raw and basic materials. Typical materials covered include silicon carbide, silicon nitride, graphites, carbon blacks, cokes and other carbon powders. The method is applicable for sulfur mass fractions from 0.005% to 2% and can be extended to higher concentrations after verification. The procedure releases total sulfur as SO2 by high-temperature combustion and quantifies SO2 by infrared absorption.

Key topics and technical requirements

Principle: Combustion of sample in an oxygen atmosphere (inductive or resistance furnace) at temperatures above 1 800 °C produces SO2, which is measured by an infrared analyser using a narrow-band optical filter.
Scope & limits: Applicable to non-oxidic ceramic powders/granules; validated range 0.005%–2% S (extensions require verification).
Apparatus & precision:
- Induction furnace (or resistance furnace alternative) with infrared cell.
- Analytical balance with 0.01 mg readability.
- Ceramic crucibles and lids (mullite/alumina).
Reagents & gases:
- Tungsten and/or iron granules as combustion accelerators (tungsten/tin mixtures noted).
- Oxygen purity ≥ 99.998% (V/V).
- Calibration standards: preferably matrix-analogous Certified Reference Materials (CRMs) or sulfates.
Sample preparation:
- Representative sampling (e.g., per ISO 8656-1).
- Dry to constant mass at 110 ± 5 °C; particle size ≤ 160 µm.
- Typical test sample masses 20–200 mg depending on expected sulfur content.
Calibration & quality control:
- Calibrate using calibration standards of similar sulfur mass.
- Verify trueness for low concentrations (

Related standards

Mentioned in the description and other ISO standards

Overview

Key topics and technical requirements

Principle: Combustion of sample in an oxygen atmosphere (inductive or resistance furnace) at temperatures above 1 800 °C produces SO2, which is measured by an infrared analyser using a narrow-band optical filter.
Scope & limits: Applicable to non-oxidic ceramic powders/granules; validated range 0.005%–2% S (extensions require verification).
Apparatus & precision:
- Induction furnace (or resistance furnace alternative) with infrared cell.
- Analytical balance with 0.01 mg readability.
- Ceramic crucibles and lids (mullite/alumina).
Reagents & gases:
- Tungsten and/or iron granules as combustion accelerators (tungsten/tin mixtures noted).
- Oxygen purity ≥ 99.998% (V/V).
- Calibration standards: preferably matrix-analogous Certified Reference Materials (CRMs) or sulfates.
Sample preparation:
- Representative sampling (e.g., per ISO 8656-1).
- Dry to constant mass at 110 ± 5 °C; particle size ≤ 160 µm.
- Typical test sample masses 20–200 mg depending on expected sulfur content.
Calibration & quality control:
- Calibrate using calibration standards of similar sulfur mass.
- Verify trueness for low concentrations (

ISO 14720-1:2013 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Related standards

Abstract

Overview

Key topics and technical requirements

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