Sample Preparation for XRF

XRF accuracy depends strongly on sample preparation. Appropriate grinding, pulverization, fusion, liquid handling, and concentration methods minimize physical and compositional effects that can compromise elemental analysis

Proper pulverization of powder samples improves XRF accuracy by controlling particle size and segregation while minimizing contamination, moisture absorption, spectral interference, and other sample-preparation errors.

Pressed and loose powder preparation methods for XRF are compared, including pelletization, binders, pressure control, contamination prevention, sample films, and techniques for analyzing very small powder quantities.

Fusion bead preparation improves XRF accuracy by eliminating particle-size and mineralogical effects, reducing matrix effects, and producing homogeneous glass samples through carefully controlled fusion and cooling.

Practical fusion bead methods use controlled oxidation to prepare ferroalloys, sulfide ores, and silicon carbide for accurate XRF analysis while reducing reliance on corrosive acid pretreatment.

Metal sample preparation for XRF requires careful control of surface condition, roughness, contamination, metallurgical structure, and cooling history to achieve accurate, reproducible elemental analysis.

Practical guidance for preparing liquid samples for WDXRF using direct liquid and droplet methods, including film selection, chemical compatibility, contamination control, measurement safety, and trace-element analysis.

Liquid solidification enables film-free vacuum XRF analysis of suitable oils, improving light-element sensitivity and preventing particle settling while providing stable, accurate measurements of heterogeneous liquid samples.