Sample Preparation for XRF Analysis
In XRF analysis, measurement accuracy depends heavily on sample homogeneity and surface quality. Raw material is first size-reduced and milled, then either compressed into a pellet or fused into a glass disc. A properly prepared sample lets your XRF spectrometer perform at its full capacity.
Preparation Workflow
The XRF sample preparation workflow varies by sample type and required analytical precision. Crushing and milling ensure homogeneity; the final step is a choice between pelletizing or fusion.
Instrument Portfolio
A complete line from crushing and milling to pressing and fusion. Every instrument is designed by Equilab for laboratory environments.
Application Areas
Frequently Asked Questions
A glass disc is superior in terms of sample homogeneity and elimination of matrix effects. Especially in samples with high silica and alumina content, it achieves precision that pellet preparation cannot match. The pellet method is faster and less costly than fusion; it is preferred for routine quality control and samples with a well-known matrix. The appropriate method depends on sample type and the precision expected from the analysis.
The EQM-402 ball mill provides fast, fine grinding for samples ranging from soft to medium hardness. The EQR-200 ring mill is preferred for hard rocks, slag and mineral samples and also offers advantages in terms of contamination avoidance. Sample hardness (Mohs scale), desired final fineness and contamination tolerance determine model selection. Contact us for a demo or technical consultation.
The EQP-110 is suited for speed-focused routine use with its design that requires no safety door and its 7" touchscreen. The EQP-210 additionally supports FTIR KBr analysis alongside XRF and holds CE + UKCA certification; the wide 8–40 mm die range offers greater flexibility. Both models use a dual-cycle pressing system.
The FX Series most commonly works with lithium tetraborate (Li₂B₄O₇), lithium metaborate (LiBO₂), or mixtures of the two. Flux selection is made according to the oxide composition of the sample. Pre-calcination may be required for samples high in sulphur or carbon. Equilab technical documentation and application notes cover flux recommendations.
Technical Consultation
Speak with our expert team to select the right instrument for crushing, milling, pressing or fusion. If you have a sample, we can arrange a demo.
