XRF Reference Materials & Sample Preparation
Improve XRF calibration and measurement reliability by matching the sample matrix, preparation method, concentration range and certified reference materials to the real application.
Typical Sample Types for XRF
The appropriate analytical method depends on the sample matrix, target analytes, concentration range and required accuracy.
Metals & Alloys
Direct elemental analysis of ferrous and non-ferrous alloys with appropriate surface preparation.
Ores & Minerals
Major and minor element analysis for geological, mining and grade-control applications.
Cement & Raw Materials
Routine process control for cement, clinker, limestone, raw meal, slag and related materials.
Petroleum & Oil
Sulfur and elemental analysis in fuel oil, crude oil, lubricants and petroleum products.
Electronics & RoHS
Screening and material verification for restricted substances, coatings and electronic materials.
Industrial Powders
Elemental analysis of powders, oxides, ceramics and process materials using pressed pellet or fusion methods.
Prepare the Sample for Reliable Measurement
XRF performance is highly dependent on particle size, homogeneity, surface condition and presentation geometry. Preparation must therefore be selected for the matrix and the required accuracy.
Dry / Clean the Sample
Remove moisture, contamination or surface oxidation where required by the method.
Reduce Particle Size
Crush and grind ores, minerals, cement and powders to improve homogeneity.
Prepare the Measurement Form
Use direct solid analysis, pressed pellet, fused bead or liquid cup according to the matrix.
Control Consistency
Keep thickness, surface finish, binder ratio and preparation conditions consistent between samples and CRMs.
How to Select the Right Reference Material
Reference material selection should follow the real sample matrix, analytes, working range and intended use of the material.
Match the Matrix
Steel should be calibrated with steel CRMs, ore with ore CRMs, cement with cement CRMs, and so on.
Bracket the Concentration
Choose multiple CRM levels that cover the expected range of each important analyte.
Consider Interferences
Use CRMs with realistic accompanying elements to represent spectral and matrix effects.
Match Preparation
Calibration CRMs should be prepared and measured using the same preparation route as routine samples.
Reference Material Options
Availability depends on analyte, matrix, concentration range, certification scope and manufacturer portfolio.
Common Standard Types
- Matrix-matched solid CRMs
- Ore and geological CRMs
- Metal and alloy CRMs
- Cement / clinker CRMs
- Petroleum sulfur standards
- Pressed-pellet / fusion calibration materials
Where XRF Is Commonly Used
Use the application context to define sample preparation, calibration strategy, CRM type and quality-control plan.
Mining & Geology
Exploration, grade control and process monitoring for ores and concentrates.
Metals & Foundry
Alloy verification, melt control and incoming material inspection.
Cement
Raw mix, clinker and final product process control.
Electronics & RoHS
Screening of regulated elements and material composition.
Need Help Selecting the Right CRM for XRF?
Tell us your instrument, sample matrix, target analytes, concentration range and analytical objective. Alpha Prime Lab will help evaluate the appropriate reference material, sample preparation route and calibration approach.