Right from the beginning we realized that efficiency of early stage mineral exploration depends on the number of analyzed geochemical samples. The number of samples collected could be up to 10000 samples per month for one exploration target. During base metal exploration, portable XRF analyzers prove to be the most effective method of generating quick and accurate analysis, but XRF do not detect gold and many other elements at the levels required in prospecting geochemistry. A solution could be the development of an effective geochemical survey method based on simple and productive sampling
technique and analytical methodology with acceptable detection limits for elements, that cannot be detected by portable/mobile XRF analyzers, and with high production rates. Sample preparation should be simple and should exclude chemical dissolution of samples. Using analytical complexes
should be reliable, easy to set up and maintain and affordable for junior exploration companies. That’s why we invented and developed MEFFA.
Ou next innovation was NEFFA – a new cost-effective express-method to detect and estimate gold and other precious metals mineralisation in crushed (fraction 2 mm) rock or core samples using handheld XRF (UK Patent pending).
Mainly GeRDA was designed and built as an instrument for NEFFA but it also can be used for automating any manual operations with hand-held portable XRF.