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Precious metal containing products which after a certain time become obsolete or are generated as non-usable manufacturing scrap, are used widely in
industry and the private household sector. Therefore it is very important to return these expensive residues to the use-cycle of precious metals by
reclaiming the contained pure metals such as gold, silver, platinum, palladium, and rhodium <xr id="fig:Precious metals in various formsPrecious_metals_in_various_forms"/> (Fig. 11.1).<figure id="fig:Precious metals in various formsPrecious_metals_in_various_forms">
[[File:Precious metals in various forms.jpg|right|thumb|Precious metals in various forms]]
</figure>
