1. Research Group on Environmental and Sanitary Analytical Chemistry (QAAS), State University of Ponta Grossa (UEPG), Av. General Carlos Cavalcanti, 4748. 84.030-900, Ponta Grossa, PR Brazil
2. Chemistry Department, State University of Ponta Grossa (UEPG), Av. General Carlos Cavalcanti, 4748. 84.030-900, Ponta Grossa, PR Brazil
3. Environmental and Sanitary Engineering Laboratory, State University of Centro-Oeste (UNICENTRO), PR 153, km 07, Riozinho, P.O. Box 21, 84500-000, Irati, PR Brazil
4. University Center of Maringá (UNICESUMAR), R. Des. Westphalen, 60 - Oficinas, 84036-350, Ponta Grossa, PR Brazil