AUTHOR=Cora Jofre Florencia , Barros Ariane I. , Nóbrega Joaquim A. , Savio Marianela TITLE=Multi-energy calibration in plasma emission spectrometry: elemental analysis of animal feeds JOURNAL=Frontiers in Analytical Science VOLUME=5 YEAR=2025 URL=https://www.frontiersin.org/journals/analytical-science/articles/10.3389/frans.2025.1527110 DOI=10.3389/frans.2025.1527110 ISSN=2673-9283