Determination of Pd(II) using an antimony film coated on a screen-printed electrode by adsorptive stripping voltammetry

Clara Pérez-Ràfols; Pedro Trechera; Núria Serrano; José Manuel Díaz-Cruz; Cristina Ariño; Miquel Esteban

doi:10.1016/j.talanta.2017.01.084

Determination of Pd(II) using an antimony film coated on a screen-printed electrode by adsorptive stripping voltammetry

Talanta. 2017 May 15:167:1-7. doi: 10.1016/j.talanta.2017.01.084. Epub 2017 Jan 31.

Authors

Clara Pérez-Ràfols¹, Pedro Trechera¹, Núria Serrano², José Manuel Díaz-Cruz¹, Cristina Ariño¹, Miquel Esteban¹

Affiliations

¹ Departament d'Enginyeria Química i Química Analítica, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, Spain.
² Departament d'Enginyeria Química i Química Analítica, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, Spain. Electronic address: nuria.serrano@ub.edu.

PMID: 28340698
DOI: 10.1016/j.talanta.2017.01.084

Abstract

The use of an antimony film coated on a screen-printed carbon electrode (ex-situ SbSPCE) is proposed for the determination of Pd(II) at ppb levels in natural samples by adsorptive stripping voltammetry using dimethylglyoxime as chelating agent. Ex-situ SbSPCE produces a better analytical performance as compared to a commercially sputtered bismuth screen-printed electrode (Bi_spSPE). The detection and quantification limits were 2.7 and 9.0µgL^-1 respectively with a good linear behaviour in the wide examined concentration range (from 1µgL^-1 up to 100.0µgL^-1, R²=0.998). The proposed ex-situ SbSPCE showed an excellent repeatability with a relative standard deviation of 0.5% for ten successive measurements and a very good reproducibility (1.6% for three different ex-situ SbSPCE units within series of ten repetitive assays). Moreover, the ex-situ SbSPCE was successfully applied for the determination of low concentration levels of Pd(II) in spiked tap water with a very high reproducibility (0.2%) and providing equivalent results to those achieved by ICP-MS measurements.

Keywords: Adsorptive stripping voltammetry; Antimony film electrode; Palladium; Screen-printed electrode.