In situ determination of V(V) by diffusive gradients in thin films and inductively coupled plasma mass spectrometry techniques using amberlite IRA-410 resin as a binding layer

Karen Silva Luko; Amauri Antonio Menegário; Carlos Alfredo Suárez; Makenly Tafurt-Cardona; Jorge Henrique Pedrobom; Ana Marta Cavinato Marchini Rolisola; Everton Tiago Sulato; Chang Hung Kiang

doi:10.1016/j.aca.2016.11.031

In situ determination of V(V) by diffusive gradients in thin films and inductively coupled plasma mass spectrometry techniques using amberlite IRA-410 resin as a binding layer

Anal Chim Acta. 2017 Jan 15:950:32-40. doi: 10.1016/j.aca.2016.11.031. Epub 2016 Nov 15.

Authors

Karen Silva Luko¹, Amauri Antonio Menegário², Carlos Alfredo Suárez³, Makenly Tafurt-Cardona³, Jorge Henrique Pedrobom¹, Ana Marta Cavinato Marchini Rolisola¹, Everton Tiago Sulato³, Chang Hung Kiang¹

Affiliations

¹ Centro de Estudos Ambientais, Universidade Estadual Paulista, 13506-900, Rio Claro, SP, Brazil; Instituto de Geociências e Meio Ambiente, IGCE, UNESP - Universidade Estadual Paulista, 13506-900, Rio Claro, SP, Brazil.
² Centro de Estudos Ambientais, Universidade Estadual Paulista, 13506-900, Rio Claro, SP, Brazil; Instituto de Geociências e Meio Ambiente, IGCE, UNESP - Universidade Estadual Paulista, 13506-900, Rio Claro, SP, Brazil. Electronic address: amenega@rc.unesp.br.
³ Centro de Estudos Ambientais, Universidade Estadual Paulista, 13506-900, Rio Claro, SP, Brazil.

PMID: 27916127
DOI: 10.1016/j.aca.2016.11.031

Abstract

Amberlite IRA-410 anionic exchange resin was evaluated as the binding layer for sampling V(V) by using Diffusive Gradients in Thin Films (DGT). V(V) was determined by inductively coupled plasma mass spectrometry (ICP-MS). Mass vs. time DGT deployments (ionic strength = 0.03 mol L^-1 NaNO₃, pH = 5.6 and T = 23.5 ± 0.5 °C) was characterized by excellent linear relationship (R² = 0.9993) and a significant retention of V(V) by the binding layer. An exchange capacity of at least 40 μg V g^-1 resin was achieved for the proposed binding layer. The diffusion coefficient obtained (7.13 ± 0.6 10^-6 cm² s^-1) agrees with the literature. The accumulation rate of V(V) was not significantly affected by ionic strength of solutions up to 0.03 mol L^-1 and for the entire studied pH range (from 3 to 9). Furthermore, when comparing the concentrations obtained using IRA-410-DGT and those obtained by direct measurement of the solution concentrations, the proposed approach provided a reduction of the ³⁵Cl¹⁶O interference on V(V) determination by ICP-MS. Determination of V in normal mode (without collision cell) in solutions containing analyte:Cl^- concentration ratio up to 1:500,000 was not affected by interference of ³⁵Cl¹⁶O⁺ polyatomic ion even when normal mode ICP-MS was used. Potential interfering ions on sampling V(V) by DGT (PO₄^3- and SO₄^2-) showed no significant effects on the accumulation rate of V(V). Laboratory tests performed using synthetic samples, natural freshwater and acid drainage water showed an excellent performance (recoveries from 93% to 110%). For in situ deployment, measurements of V(V) by the proposed approach was not significantly different (95.5%) from the value of dissolved V concentration.

Keywords: (35)Cl(16)O; Agarose; DGT; ICP-MS; Vanadium.