Prof. André Fernando de Oliveira is a faculty member in the Department of Chemistry at the Universidade Federal de Viçosa (Brazil). His research focuses on the treatment of chemical data, including uni‑ and multivariate statistical approaches; the development, optimization, and validation of analytical methods; and sample pre‑treatment strategies. His work spans techniques such as spectrophotometry, potentiometry, voltammetry, gas chromatography, and high‑performance liquid chromatography. He also conducts research on equilibria in solution, including the development of the XXI Method. His book on this subject was selected as one of the finalists for the Jabuti Acadêmico Prize in the Chemistry/Materials category, the most prestigious literary award in Brazil.