SciELO - Scientific Electronic Library Online

 
vol.85 issue3Physical-Chemical characterization, microscopic sweeping and x-ray dispersion of classy mixed by Opuntia ficus indica in the high region of Tacna author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

  • Have no cited articlesCited by SciELO

Related links

  • Have no similar articlesSimilars in SciELO

Share


Revista de la Sociedad Química del Perú

Print version ISSN 1810-634X

Abstract

ROMERO-BONILLA, Hugo Ítalo et al. Application of anodic redisolution voltamperometry for the determination of antimonium. Rev. Soc. Quím. Perú [online]. 2019, vol.85, n.3, pp.293-304. ISSN 1810-634X.

A voltammetric method was validated to determine the concentration of antimony in aqueous medium. The voltammetric technique of anodic redissolution was used, using a potentiostat. Chronoamperometry was applied at E = -1,2 V for 50 s. A linear sweep voltammetry was applied with potentials between E = -1,2 V and E = 0,5 V at a speed of 20 mV/s. This was carried out in 0,5 M H PO electrolytic solution, where an increase in the current intensity peak can be observed as a function of the concentration of the solutions evaluated at a potential of 84,96 mV. To validate the method, linearity, precision, limit of detection and limit of quantification were determined. Four concentrations of antimony were prepared in triplicate, in a range of 1, 5, 10, 15, 20 mg/L, respectively. A calibration curve of experimental concentration expressed as current intensity (I) vs theoretical concentration was constructed. The linearity was demonstrated starting from the coefficient of proportionality of 0,9979 with coefficient of variation (CV) of 18,2 %. The limit of detection and quantification had values of 1,041 mg/L and 1,718 mg/L respectively.

Keywords : validation; electroanalytical; voltamperometry; antimony.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License