XRF does 30 elements. Mainly PGM. If you want a full spectrum, go to Reed Labs, Carlsbad Ca.
I had that trouble. I have a lot of bauxite on my property. It will drive any detector nuts. You think you hit th muther load, and its aluminum.
Reed will give you an assay that covers 60+ elements. I think its $75. Their website tells everything. They also offer a PGM assay.
Hope this helps.