Director of the Institute of Chemistry – Unicamp (Campinas, Brazil), is Full Professor at the Unicamp, Department of Analytical Chemistry, head of the Sample preparation, spectrometry and mechanization group - GEPAM, and member of the advisory board of the National Institute of Science and Technology - INCT for Bioanalitics. He acted as invited professor at Pau University – Pau, France, and at University of Ballears Island – Palma, Mallorca, Spain. Additionally, he acted as adviser in more than 60 Master Dissertations or PhD Thesis.He belongs to the advisory board of the Metallomics, Journal of Analytical Atomic Spectrometry, Journal of Integrated Omics, and is Editor-in-Chief of the Brazilian Journal of Analytical Chemistry. He also acts as member of the advisory board of the Brazilian Chemistry Association (ABQ). He received a diversity of Awards along his carrier, in 2019 was admitted as Fellow of the Royal Society of Chemistry, and he is researcher 1A of CNPq.Author or co-author over 230 research articles, 11-chapter books, 5 patents, over 50 invited lectures in national/international meetings, and Editor of 2 books. The main research interest includes bioanalytical with emphasis on speciomics, mass and atomic spectrometry, sample preparation, forensic and mechanization. de Jesus, J.R. holds a Ph.D.'s degree in Sciences with an emphasis in Analytical Chemistry from the University of Campinas (Unicamp, Brazil) (2018). Actually, he is an Assistant Professor in the Department of Chemistry from the Federal University of Viçosa (Minas Gerais, Brazil). De Jesus has experience in the field of bioanalytics, dealing in proteomics and metallomics studies and environmental analysis, as well as developing new materials and sample preparation methods to simplify complex samples. He acts as a Member of the Advisory Board of some scientific journals in the area.

• Preface Marco Aurélio Zezzi Arruda and Jemmyson Romário de Jesus1. Elemental determination for clinical diagnosis and prognosis: Challenges and trends in sample preparationMarcia Foster Mesko, Alessandra Schneider Henn, Diogo La Rosa Novo, Ethel Antunes Wilhelm and Erico Marlon Moraes Flores2. Advanced statistical tools and machine learning applied to elemental analysis associated with medical conditionsGeorge L. Donati3. ICP-MS as a tool to understand trace element homeostasis in neurological disordersJemmyson Romário de Jesus, Edileuza Marcelo Vieira, Jéssica Passos de Carvalho and Lucas Hestevan Malta Alfredo4. Biomedical analysis by ICP-MS: A focus on single cellMaria Montes Bayón, Mario Corte-Rodríguez, Roberto Álvarez-Fernández and Juliana Severo Fagundes5. Exploring ICP-MS as a versatile technique: From imaging to chemical speciation analysisRenata Amais, Aline Martins de Andrade, Ana Beatriz Santos da Silva, Daniel Carneiro Freitas, Danielle da Silva Francischini, Alan James Stewart and Marco Aurélio Zezzi Arruda