Superpanner

He also continued active participation in his technical field, and the superpanners and infrasizers which he developed found their way into many ore-dressing laboratories throughout the world.

[…] Gravity separation by jigging, by using shaking tables, or superpanners; […]

The safest solution consists in concentrating these metals by means of shaking tables, superpanners, or small gravity spinning concentrators, then melting the whole of the concentrate to determine the gold content.