Overview
EN ISO 10058-3:2008 - Chemical analysis of magnesite and dolomite refractory products (alternative to X‑ray fluorescence) - Part 3 specifies instrumental methods using flame atomic absorption spectrophotometry (FAAS) and inductively coupled plasma atomic emission spectrometry (ICP‑AES / ICP‑AES). It is part of the ISO 10058 series for refractory chemical analysis and provides validated FAAS/ICP‑AES procedures for determining major and minor oxide components in magnesite and dolomite refractories and raw materials.
Key topics and technical requirements
- Analytical scope: Methods are applicable to a defined range of oxide contents (mass %), for example:
- SiO2: 0.1–10 %, Al2O3: 0.05–10 %, Fe2O3: 0.01–10 %, CaO: 0.01–10 %, MnO/TiO2/ZrO2: 0.01–1 %, Cr2O3: 0.01–3 %, P2O5: 0.01–5 %, Na2O/K2O: 0.01–1 % and LOI up to 60 %.
- Techniques covered:
- ICP‑AES for multi‑element emission analysis (including residual silica in stock solutions). Example: Si emission measured at 251.611 nm in one procedure.
- FAAS for selected elements (e.g., Mn, Ca, Cr, Na, K) where flame AAS is appropriate.
- Calibration & quality controls:
- Use of mixed standard solutions, matrix solutions (stock solutions S1, S′1, S3, S4 referenced), internal standards (e.g., scandium/yttrium), blank tests and calibration graphs adjusted through the origin.
- Procedures reference sample dissolution and stock solution preparation in ISO 10058‑1 and general method requirements in ISO 26845.
- Reporting: Test report content and calculation formulas for mass fraction determination are specified (including correction for loss on ignition where applicable).
Practical applications and users
- Who uses it:
- Refractory manufacturers and QC laboratories testing magnesite and dolomite products.
- Independent materials testing laboratories, research institutions, and R&D groups developing refractory formulations.
- Standards bodies and procurement/specification engineers requiring XRF‑alternative chemical analysis methods.
- Typical uses:
- Routine quality control of raw materials and fired/unfired refractory products.
- Batch release testing and process control where XRF is unavailable or complementary verification by FAAS/ICP‑AES is required.
- Regulatory or contractual compliance testing and comparative analysis in failure investigations.
Related standards
Keywords: EN ISO 10058‑3:2008, magnesite and dolomite refractory products, chemical analysis, FAAS, ICP‑AES, atomic absorption spectrophotometry, inductively coupled plasma atomic emission spectrometry, XRF alternative, refractory QC.