Precious metals testing with ED-XRF spectrometry
Precious metals demand careful analysis. The high monetary value of gold and silver — as well as of the platinum-group metals means that purity is a prime consideration when trading in these metals. However, the presence of other elements in minor or trace amounts can sometimes be difficult to detect, but can have a dramatic effect on value.
Elemental analysis therefore is required at many different points in the complex precious metals supply/recycling chain from refiner to standards bureau to hallmark center or jewelry shop. ED-XRF spectrometers have become the preferred means of analysis at many of these key supply points. This paper examines the effectiveness of the next generation SPECTRO MIDEX with regard to precision and accuracy, including analytical results, for precious metals testing.