Interpretation of seasonal variation of metals and abiotic properties in a tropical lake using multivariate analysis and MINTEQA2 program - Barreto, Wagner José; Ribeiro, Maira Reche; Solci, Maria Cristina; Scarminio, Ieda Spacino; Nozaki, Jorge; Oliveira, Elisabeth de; Barreto, Sônia Regina Giancoli (Analytical Sciences, 2005)