Overview
ISO 10058-1:2008 - Chemical analysis of magnesite and dolomite refractory products (alternative to the X‑ray fluorescence method) - Part 1: Apparatus, reagents, dissolution and determination of gravimetric silica - specifies the laboratory equipment, reagents, sample dissolution procedures and the gravimetric determination of silica (SiO2) for magnesite and dolomite refractory products and raw materials. It provides a wet‑chemical alternative to XRF for quality control and compositional analysis across defined ranges of determination.
Key topics and technical requirements
- Scope and applicability
- Targets chemical analysis of magnesite and dolomite refractory products and raw materials.
- Lists ranges of determination for major oxides (examples from Table 1): SiO2: 0.1–10%, MgO: 30–99.9%, CaO: 0.01–60%, and other oxides (Al2O3, Fe2O3, TiO2, etc.).
- Apparatus
- Normal laboratory glassware and equipment as referenced to ISO 26845 (general laboratory requirements for refractories).
- Reagents and standards
- Use of analytical‑grade reagents and water; conformity with ISO 6353 series.
- Preparation and verification of standard volumetric and stock solutions (e.g., Zn, EDTA, Al2O3, SiO2 standard solutions).
- Sample preparation and decomposition
- Procedures for sample preparation, loss on ignition (LOI) determination (gravimetric).
- Decomposition/dissolution methods including fusion techniques and hydrofluoric acid attack to prepare solutions for analysis.
- Gravimetric silica determination
- Detailed gravimetric procedure to quantify silica after appropriate dissolution and separation.
- Calculations, result expression and reporting
- Guidance for calculation, adoption of test results, and required content of the test report.
Practical applications and users
- Who uses ISO 10058-1:2008
- Refractory manufacturers, quality control (QC) laboratories, materials testing labs, and R&D teams working with magnesite and dolomite refractories.
- Regulatory and standards bodies needing validated wet‑chemical alternatives to XRF.
- Why it’s useful
- Provides a validated wet‑chemical workflow for accurate gravimetric silica results where XRF is unavailable or as a confirmatory method.
- Supports routine QC of raw materials and finished refractory products, troubleshooting of production issues, and specification compliance.
Related standards
- ISO 10058 (other parts): Part 2 - Wet chemical analysis; Part 3 - FAAS and ICP‑AES methods.
- ISO 26845 - Chemical analysis of refractories: general requirements for wet chemical, AAS and ICP‑AES methods.
- ISO 6353‑1/2/3 - Reagents for chemical analysis (general test methods and specifications).
Keywords: ISO 10058-1:2008, magnesite refractory, dolomite refractory, gravimetric silica, chemical analysis, apparatus, reagents, dissolution, fusion, hydrofluoric acid, LOI, wet chemical analysis.