Alternative method for the elemental characterization of fine particulate matter (pm2.5) using handheld x-ray fluorescence on quartz filters: applications in health research - Pereira, Elizeu Chiodi; Barbosa, Dayane da Fonseca; Nogueira, Thiago; Olympio, Kelly Polido Kaneshiro (Congresso Latino-Americano de Toxicologia Clínico-Laboratorial (ToxiLatin 2025), 2025)