title: A batch injection analysis system with square-wave voltammetric detection for fast and simultaneous determination of naphazoline and zinc.
abstract: In this work, a batch-injection analysis system with square-wave voltammetric (BIA-SWV) detection was applied for the first time to the simultaneous determination of inorganic (zinc) and organic (naphazoline) species. Both compounds were detected in a single run (70 injections h(-1)) with a small injection volume (∼100 µL). The calibration curves exhibited linear response range between 3.0 and 21.0 μmol L(-1) (r=0.999) for naphazoline and between 10.0 and 60.0 μmol L(-1) (r=0.992) for zinc. The detection limits were 0.13 and 0.04 μmol L(-1) for zinc and naphazoline, respectively. Good reproducibility was achieved for multiple measurements of a solution containing both species (RSD<1.0%; n=20). The results obtained with the BIA-SWV method for the simultaneous determination of naphazoline and zinc were compared to those obtained by HPLC (naphazoline) and by FAAS (zinc); no statistically significant differences were observed (95% confidence level).
authors.affiliation: Instituto de Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila, 2121 Uberlândia, MG, Brazil.
authors.forename: Thiago da Costa
authors.initials: Tda C
authors.lastname: Oliveira
authors.affiliation: Instituto de Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila, 2121 Uberlândia, MG, Brazil.
authors.forename: Jhonys Machado
authors.initials: JM
authors.lastname: Freitas
authors.affiliation: Instituto de Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila, 2121 Uberlândia, MG, Brazil.
authors.forename: Rodrigo Alejandro Abarza
authors.initials: RA
authors.lastname: Munoz
authors.affiliation: Instituto de Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila, 2121 Uberlândia, MG, Brazil. Electronic address: emrichter@iqufu.ufu.br.
authors.forename: Eduardo Mathias
authors.initials: EM
authors.lastname: Richter
keywords: Boron doped diamond; Fast analysis; Inorganic and organic species; Portable system; Simultaneous analysis