ISO 21079-1:2008 PDF

Chemical analysis of refractories containing alumina, zirconia and silica — Refractories containing 5 percent to 45 percent of ZrO2 (alternative to the X-ray fluorescence method) — Part 1: Apparatus, reagents and dissolution

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Title (English):

ISO 21079-1:2008

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 13
Publication date:: April 1, 2008
Edition:: ISO IS 21079 edition 1 version 1
ICS:: 71.040.40

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Description (English):

ISO 21079-1:2008 specifies methods for the chemical analysis of AZS (alumina, zirconia, and silica) refractory products (containing 5 % to 45 % of ZrO2) and raw materials, using traditional ("wet") methods, inductively coupled plasma atomic emission (ICP-AE) spectrometry and flame atomic absorption (FAA) spectrometry. It covers apparatus, reagents and dissolution methods. ISO 21079-1:2008 is not applicable to MgO-based refractories. ISO 21079-1:2008 gives alternatives to the X-ray fluorescence (XRF) method given in ISO 12677.

Technical details

Technical committee: ISO/TC 33 - Refractories
SKU: ISO 21079-1:2008

Abstract

Overview

ISO 21079-1:2008 defines the apparatus, reagents and dissolution methods for chemical analysis of AZS refractories - materials containing alumina (Al2O3), zirconia (ZrO2) and silica (SiO2) - specifically for products and raw materials with 5% to 45% ZrO2. It specifies traditional “wet” chemistry, fusion and hydrofluoric-acid dissolution approaches, and prepares samples for instrumental methods such as ICP-AES (inductively coupled plasma atomic emission spectrometry) and FAAS/FAA (flame atomic absorption spectrometry). This part is an alternative to X-ray fluorescence (XRF) methods (see ISO 12677) and does not apply to MgO-based refractories.

Key topics and requirements

Scope and applicability: AZS refractories containing 5–45% ZrO2; excludes MgO-based products.
Apparatus and reagents: Lists required laboratory equipment and reagent specifications; emphasizes analytical-grade reagents and purified water.
Standard solutions: Preparation and standardization procedures for oxide standard solutions (Al2O3, SiO2, ZrO2, TiO2, CaO, MgO, Fe2O3, HfO2, etc.).
Sampling and LOI: Sampling rules and loss on ignition (LOI) determination referenced to ISO 26845.
Decomposition and dissolution methods: Multiple decomposition routes to remove bulk silica and liberate analytes:
- Fusion with alkali carbonate and boric acid (followed by dehydration or coagulation to remove SiO2).
- Hydrofluoric acid attack tailored for flame photometry, AA, or ICP-AES.
Preparation for instrumental analysis: Producing solutions suitable for wet chemical analysis, ICP-AES, and FAAS/FAA.
Alternative to XRF: Gives validated wet-chemistry and spectrometric alternatives to ISO 12677 XRF methods.

Practical applications and intended users

Quality control laboratories in refractory manufacturing that test AZS bricks, castables and raw materials.
Metallurgical and ceramic manufacturers requiring accurate composition data for process control.
Analytical chemists and materials engineers selecting dissolution routes and preparing samples for ICP-AES or FAAS.
Standards bodies and test laboratories needing an XRF alternative or cross-validation method. Practical benefits include reliable oxide determinations (SiO2, Al2O3, ZrO2, TiO2, CaO, MgO, Fe2O3, HfO2, trace alkalis and transition metals) and standardized sample preparation workflows.

Related standards

ISO 12677 - XRF method for similar AZS refractory analysis (ISO 21079-1 provides alternative methods).
ISO 26845 - General requirements for wet chemical, AAS and ICP-AES analysis referenced throughout ISO 21079-1.

Keywords: ISO 21079-1:2008, chemical analysis, refractories, AZS, alumina zirconia silica, dissolution methods, fusion, hydrofluoric acid, ICP-AES, FAAS, XRF alternative.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and requirements

Scope and applicability: AZS refractories containing 5–45% ZrO2; excludes MgO-based products.
Apparatus and reagents: Lists required laboratory equipment and reagent specifications; emphasizes analytical-grade reagents and purified water.
Standard solutions: Preparation and standardization procedures for oxide standard solutions (Al2O3, SiO2, ZrO2, TiO2, CaO, MgO, Fe2O3, HfO2, etc.).
Sampling and LOI: Sampling rules and loss on ignition (LOI) determination referenced to ISO 26845.
Decomposition and dissolution methods: Multiple decomposition routes to remove bulk silica and liberate analytes:
- Fusion with alkali carbonate and boric acid (followed by dehydration or coagulation to remove SiO2).
- Hydrofluoric acid attack tailored for flame photometry, AA, or ICP-AES.
Preparation for instrumental analysis: Producing solutions suitable for wet chemical analysis, ICP-AES, and FAAS/FAA.
Alternative to XRF: Gives validated wet-chemistry and spectrometric alternatives to ISO 12677 XRF methods.

Practical applications and intended users

Quality control laboratories in refractory manufacturing that test AZS bricks, castables and raw materials.
Metallurgical and ceramic manufacturers requiring accurate composition data for process control.
Analytical chemists and materials engineers selecting dissolution routes and preparing samples for ICP-AES or FAAS.
Standards bodies and test laboratories needing an XRF alternative or cross-validation method. Practical benefits include reliable oxide determinations (SiO2, Al2O3, ZrO2, TiO2, CaO, MgO, Fe2O3, HfO2, trace alkalis and transition metals) and standardized sample preparation workflows.

Related standards

ISO 12677 - XRF method for similar AZS refractory analysis (ISO 21079-1 provides alternative methods).
ISO 26845 - General requirements for wet chemical, AAS and ICP-AES analysis referenced throughout ISO 21079-1.

Keywords: ISO 21079-1:2008, chemical analysis, refractories, AZS, alumina zirconia silica, dissolution methods, fusion, hydrofluoric acid, ICP-AES, FAAS, XRF alternative.

ISO 21079-1:2008 PDF

Technical details

Abstract

Overview

Key topics and requirements

Practical applications and intended users

Related standards

Related standards

Abstract

Overview

Key topics and requirements

Practical applications and intended users

Related standards

Related standards

Chemical analysis of refractory products by X-ray fluorescence (XRF) - Fused cast-bead method (ISO 12677:2011)

Chemical analysis of refractories - General requirements for wet chemical analysis, atomic absorption spectro…

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