Au captured on resin
Eight standards from STD0 to STD7 covered 0 to 2031.6 ug Au/g resin. ICP-OES showed 95.5-100% Au extraction across the tested standards.
Independent analytical validation
University of Girona Au Validation
SORBEX-Au loaded resin standards were evaluated at the University of Girona using micro-XRF, EDXRF and ICP-OES. The results validate the key measurement target: gold captured on selective resin and read directly by XRF.
Au-loaded resin target
Successful method verification
Gold was detected on individual resin grains, EDXRF response increased with resin loading and ICP-OES confirmed high Au extraction from solution.
XRF response confirmed
EDXRF Au La net peak increased from 0 to 806.93 Cps across the standard series, giving a preliminary response suitable for calibration work.
Micro-XRF detection
Gold was detected on an individual STD7 resin grain, and the Au peak was also detectable in STD1, supporting the loaded-resin measurement concept.
Girona results
Loaded SORBEX-Au resin gives a measurable, concentration-dependent XRF signal.
The figures below are processed from the University of Girona summary workbook. They show the analytical target validation, not a final certified ore assay method.
Why this matters
The Girona work validates the central SORBIONEX interface: selective resin simplifies the matrix before XRF measurement. For SORBEX-Au, this means the ore chemistry can be converted into a loaded resin target that is cleaner, repeatable and easier to calibrate than direct measurement of complex mineral material.
Public interpretation: successful university validation of the SORBEX-Au loaded-resin measurement principle. Ore-specific performance still requires project validation against fire assay, ICP or other accepted reference data.