Determination of Pb(II) by sequential injection/stripping analysis at all-plastic electrochemical fluidic cells with integrated composite electrodes

Christos Kokkinos; Anastasios Economou; Nicholas G Goddard; Peter R Fielden; Sara J Baldock

doi:10.1016/j.talanta.2016.03.025

Determination of Pb(II) by sequential injection/stripping analysis at all-plastic electrochemical fluidic cells with integrated composite electrodes

Talanta. 2016 Jun 1:153:170-6. doi: 10.1016/j.talanta.2016.03.025. Epub 2016 Mar 7.

Authors

Christos Kokkinos¹, Anastasios Economou², Nicholas G Goddard³, Peter R Fielden⁴, Sara J Baldock⁴

Affiliations

¹ Laboratory of Analytical Chemistry, Department of Chemistry, University of Athens, Athens 157 71, Greece.
² Laboratory of Analytical Chemistry, Department of Chemistry, University of Athens, Athens 157 71, Greece. Electronic address: aeconomo@chem.uoa.gr.
³ School of Chemical Engineering and Analytical Science, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
⁴ Department of Chemistry, Lancaster University, Lancaster LA1 4YB, UK.

PMID: 27130105
DOI: 10.1016/j.talanta.2016.03.025

Abstract

This work reports the development of a sequential injection/stripping analysis method for the determination of trace Pb(II) at injection-moulded electrochemical fluidic cells. Conducting carbon fibre-loaded polystyrene electrodes were integrated within the plastic cells. The flow-through cells were incorporated into a home-made sequential injection analysis (SIA) manifold. Different experimental parameters for the detection of Pb(II) were investigated including the type and concentration of the supporting electrolyte, the conditions of the stripping step, the volume of the sample, the flow rate and the accumulation potential. The LOD for Pb(II) was 0.5μgL(-1), the within-cell % relative standard deviation (n=8) was 3.1% and the between-cell % relative standard deviation (n=5) was 8.9% for 25μgL(-1) Pb(II). The cells were applied to the determination of Pb(II) in tapwater and a phosphate fertilizer sample.

Keywords: Conductive electrode; Injection moulding; Pb(II); Sequential injection; Stripping analysis.