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

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 NaNO, pH = 5.6 and T = 23.5 ± 0.5 °C) was characterized by excellent linear relationship (R = 0.9993) and a significant retention of V(V) by the binding layer. An exchange capacity of at least 40 μg V g resin was achieved for the proposed binding layer. The diffusion coefficient obtained (7.13 ± 0.6 10 cm s) 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 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 ClO 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 ClO polyatomic ion even when normal mode ICP-MS was used. Potential interfering ions on sampling V(V) by DGT (PO and SO) 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.

Extending the functionality of the slurry ferrihydrite-DGT method: Performance evaluation for the measurement of vanadate, arsenate, antimonate and molybdate in water

“…Zirconium oxide (Zr-oxide DGT) as a binding agent in DGT has also been studied for quantification of (Guan et al, 2015). While Amberlite resins have been used as binders in DGT for As V (Rolisola et al, 2014) and V V (Luko et al, 2017).…”

Diffusive gradients in thin films: devices, materials and applications

“…This type of DGT has been developed for measuring Pb and MeHg in seawaters and freshwaters (Pescim et al 2012;Tafurt-Cardona et al 2015). Rolisola et al (2014) and Luko et al (2017) immobilized Amberlite IRA 910 into polyacrylamide gel to form a DGT binding phase capable of measuring As(III) and V, and the DGT performance was independent of pH 5-9 and pH 3-9 for the two analytes, respectively. In addition, several binding materials have been developed for the measurement of Hg species.…”