Overview
EN 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. This CEN/ISO standard specifies the laboratory equipment, reagent quality, sample preparation, decomposition/dissolution techniques and the gravimetric determination of silica (SiO2) for magnesite and dolomite refractory products and raw materials. It is intended as a wet‑chemical alternative to X‑ray fluorescence (XRF) analysis.
Key topics and technical requirements
- Scope and applicability: Procedures apply to magnesite and dolomite refractories within defined ranges (examples: SiO2 0.1–10% by mass; MgO 30–99.9%; CaO 0.01–60%; LOI up to 60%). Values are expressed after loss on ignition (LOI) correction.
- Apparatus: Normal laboratory glassware and equipment as referenced in ISO 26845 (general requirements for wet chemical analysis, AAS and ICP‑AES).
- Reagents and solution standards: Requirement to use analytical‑grade reagents and distilled (or equivalent) water. The standard details preparation and verification of standard volumetric solutions (e.g., CyDTA, zinc, EDTA) and stock oxide solutions (Al2O3, CaO, Cr2O3, Fe2O3 and dilutions).
- Sample preparation and LOI: Instructions for sample treatment and gravimetric measurement of loss on ignition prior to chemical determinations.
- Decomposition and dissolution methods: General decomposition techniques and two principal dissolution routes:
- Fusion methods (alkali/flux fusion) for complete dissolution of refractory matrices.
- Hydrofluoric acid attack for silicate breakdown where appropriate.
- Silica determination: Gravimetric separation and weighing procedures for SiO2 quantification, calculation and expression of results, and guidelines for test reporting.
- Quality and reference documents: Normative references include ISO 6353 series (reagent specifications) and ISO 26845.
Applications and users
- Who uses it: Analytical laboratories, refractory manufacturers, raw material suppliers, quality control personnel, materials scientists, metallurgists and regulatory bodies.
- Practical uses:
- Quality control of magnesite and dolomite refractory bricks, castables and raw minerals.
- Routine laboratory analysis where XRF is not available or as a confirmatory wet‑chemical method.
- R&D and failure analysis requiring precise silica determination and chemical composition profiling.
Related standards
- ISO 10058 series:
- Part 2: Wet chemical analysis
- Part 3: FAAS and ICP‑AES methods
- ISO 26845:2008 - General requirements for wet chemical analysis, AAS and ICP‑AES
- ISO 6353 parts - Reagent specifications
Keywords: EN ISO 10058-1:2008, chemical analysis, magnesite, dolomite, refractory products, gravimetric silica, dissolution, hydrofluoric acid, fusion, wet chemical analysis, quality control.