What Does XRF Measure?

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XRF machines work on the science of X-ray fluorescence. XRF machines produce a targeted radiation beam which, when aimed at samples, measures the amounts of each element present. The machine presents this by producing a percentage breakdown. The XRF produces lab-quality results in seconds that give us a highly accurate idea of the composition of a given item.

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How Does XRF Analysis Work?

 

The XRF machine emits a concentrated beam of X-rays onto a focused spot. We can adjust the target size by always aiming to choose the largest possible 'spot size' where the item has a flat surface to receive the beams evenly. The X-rays penetrate the material's surface and 'excite' the atoms in the alloy. The energy intensity that these atoms emit is then analysed and collated automatically to provide a reading as to the percentage of each element in the item, producing highly accurate results. Accuracy is maintained by continual calibration against expensive reference standards and subsequent reading adjustment. Samplers use the Fischer machines at Assay Offices in the UK.

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Is XRF Destructive?

 

XRF testing is a type of nondestructive analysis, unlike the old-fashioned 'acid test method. The amount of radiation emitted by our desktop XRF machine is similar to what you get from a dental X-ray. Used correctly, it is perfectly safe and does not render any object 'radioactive' or dangerous! Acid testing depends on an experienced individual making a small scratch on the surface of the metal and placing a tiny drop of highly concentrated acid on the item. The chemical reaction is observed, which determines whether the item is indeed gold and, if so, whether it's the high, medium or low carat. Acid testing cannot determine whether, for example, an item is 21 carats or 22 carats.

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Are you interested in getting your jewellery tested?

 

Please book an appointment and see our XRF machine at work. We provide a comprehensive report detailing the composition and carat of each tested item.

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