Multivariate cathodic square wave stripping voltammetry optimization for nitro group compounds determination using antimony film electrodes

BETANCOURTH, JESSICA MORENO; CUELLAR, MARIELA; ORTIZ, PATRICIA I.; PFAFFEN, VALERIA

MICROCHEMICAL JOURNAL

ELSEVIER SCIENCE BV

Año: 2018 vol. 139 p. 139 - 139

0026-265X

he main goal of this paper is the optimization of the square wave voltammetric response of antimony film electrode (SbFE) to determine reducible nitro groups using response surface methodology (RSM). The SbFE was prepared on a glassy carbon electrode (GCE) while cathodic stripping square wave voltammetry (CSSWV) was used as detection technique. In this study, the optimization process of solution pH and 4,6-dinitro-o-cresol (DNOC) ac-cumulation time was carried out using a Central Composite Design (CCD) while a Box?Behnken Design for SWV instrumental variables optimization. The two reduction current peaks were used as dependent variable to evaluate the performance of the system. For solution pH and DNOC accumulation time the optimization process considered only reduction current peak, while for SWV instrumental parameters (step, amplitude and frequency) both the relationship between current peak and standard deviation with the different factors were analysed, finally both designs were