2020
Portable X-ray Fluorescence of Zinc Applied to Human Toenail Clippings
The purpose of this study was to see if it was feasible to measure the zinc levels in the fingernails of people. They used an x-ray fluorescence to measure how much zinc was present in the nails. It was found that the latter was very sensitive at detecting zinc in the nail and would be able to measure fluctuating levels of zinc as time went on.