Emily Kaplan using XRF (IMAGE) Dickinson College Caption Emily Kaplan using portable X-Ray Fluorescence to detect elements in pigments on a qero at the Smithsonian National Museum of the American Indian. Credit NMAI staff Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.