1
Prepare
Crush, mill and homogenise the sample to the project protocol.
Selective resin + XRF for gold
SORBIONEX Au
A gold-selective workflow that transfers Au from prepared ore material onto SORBIONEX Au resin, creating a cleaner and repeatable target for direct XRF measurement.
White resin granules + XRF spectrum
Designed for faster local feedback
Benchtop XRF readout with loaded resin targets and a clear Au peak around 9.7 keV.
10-50 gtypical prepared sample range
1.5-5 hworkflow depending on sulphides
XRFloaded resin measurement
QA/QCstandards and reference checks
Customer-material test
Start with a SORBIONEX Au test batch at our cost.
For suitable gold projects, MEFFA Lab can run a limited initial SORBIONEX Au test batch on customer material at our cost. Selected results can be checked by ICP-OES or AAS, so the method is assessed against real project material before any larger deployment decision.
Useful starting material: prepared pulps, pulp rejects or representative ore/residue samples with available reference values, expected grade range and matrix description.
Workflow
Selective chemistry before measurement.
SORBIONEX Au is not positioned as a universal certified assay replacement. It is a practical analytical platform for faster local decisions, supported by reference-lab comparison where required.
2
Pretreat and leach
Use thermal pretreatment for sulphide-rich ores, then controlled leaching with ultrasound where appropriate.
3
Capture
Load dissolved gold onto SORBIONEX Au resin under defined conditions.
4
Measure
Filter the resin and read it by calibrated XRF with standards and repeatability checks.
University validation
University of Girona verified the Au-loaded resin target.
Independent tests with micro-XRF, EDXRF and ICP-OES confirmed that SORBIONEX Au resin can capture gold from solution and produce a measurable XRF response on the loaded resin. This validates the analytical interface that the SORBIONEX platform is built around.
Project samples still require material-specific calibration against reference assays, especially for high-grade ores and sulphide-rich matrices.
Where it fits
Exploration sample screening, drill-core prioritisation, mine-site decision support, residue checks and projects where rapid feedback can guide what should be sent for full reference analysis.
Early validation on sulphide ores and partner samples showed the value of the resin-XRF approach while also making resin capacity and ore-specific calibration visible as practical development parameters.