Overview
EN ISO 10058-2:2008 (published by CEN/ISO) specifies traditional wet chemical analysis methods for the chemical determination of components in magnesite and dolomite refractory products and their raw materials. It is Part 2 of the ISO 10058 series that provides an alternative to X‑ray fluorescence (XRF) by detailing laboratory procedures for dissolution, colourimetric and titrimetric determinations across typical refractory component ranges.
Key topics and technical requirements
- Scope and applicability: Applicable to magnesite/dolomite refractories and raw materials; covers components within defined mass-fraction ranges (examples from the standard):
- SiO2: 0.1–10 %
- MgO: 30–99.9 %
- CaO: 0.01–60 %
- Al2O3, Fe2O3, TiO2, MnO, Na2O, K2O, Cr2O3, ZrO2, P2O5 and LOI (loss on ignition) within specified ranges.
- Wet chemical methods described:
- Colourimetric molybdenum‑blue method for silicon(IV) oxide (SiO2) (including combined coagulation/dehydration options).
- Procedures using hydrofluoric acid and boric acid treatments to stabilise silicon prior to colour development.
- Spectrophotometric measurement details (e.g., measurement at 650 nm, calibration graph and blank tests) and precision checks for repeatability.
- Methods for other oxides by titration, complexation or absorption spectroscopy where applicable (summarised in the contents of the standard).
- Quality and laboratory controls: Includes calibration-graph plotting, blank determinations, replicate measurements and acceptance criteria for absorbance differences.
- Reference to apparatus and reagents: Part 1 (ISO 10058-1) provides required apparatus, reagent formulations and dissolution procedures referenced throughout Part 2.
Practical applications and users
- Who uses it: Analytical chemists, quality control laboratories, refractory manufacturers, metallurgical engineers, R&D teams, procurement/specification specialists, and independent testing bodies.
- Why it’s used:
- Routine quality control of magnesite and dolomite refractories.
- Verification of raw materials prior to production.
- Complementary or alternative method where XRF is unavailable or to cross-check instrumental results.
- Compliance with product specification, batch release, failure analysis and material certification.
- Industries: Steelmaking, cement, lime, glass, non‑ferrous metallurgy and refractory product supply chains.
Related standards
- ISO 10058-1:2008 - Apparatus, reagents, dissolution and gravimetric silica.
- ISO 10058-3:2008 - FAAS and ICP‑AES instrumental methods.
- ISO 26845 - General requirements for wet chemical analysis and atomic spectrometry methods.
Keywords: EN ISO 10058-2:2008, wet chemical analysis, magnesite, dolomite, refractory products, chemical analysis, molybdenum blue, SiO2, CEN, ISO 10058 series.