What is generally tested for?
Recyclers sort mixed-metal scraps into product-specific categories based on the alloy of the scrap metal. There is a long list of alloys; one source states over 50,000 different metal combinations (alloys).
Why is x-ray fluorescence utilized?
Previous to x-ray fluorescence instruments, recyclers used a combination of chemical analysis and historical knowledge to sort metals to the best of their ability. This approach, however, was timely and relied too heavily on a person's history in the field.
With the introduction of XRF recyclers now enjoy a higher degree of accuracy and faster determination of metal alloys - and, with the recent innovation of hand held portable XRF analyzers a recycler can have lab quality results in the palm of their hand - regardless of a samples size, shape or location.
Two of the best Skyray XRF options for scrap material identification:

The Pocket
Mobile, accurate and fast analysis
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EDX-3600B
Widest range of elements available
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