Using DGT Passive Samplers and MC-ICPMS to Determine Pb and Zn Isotopic Signature of Natural Water

Desaulty, Anne-Marie; Bodard, Céline; Laurioux, Thierry; Guerrot, Catherine; Millot, Romain; Berho, Catherine

doi:10.1016/j.proeps.2015.07.018

Cited by 7 publications

(1 citation statement)

References 6 publications

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“…Dalqvist et al investigated the isotopic composition of Nd in fresh and marine waters [12], while Turner et al analyzed 235 U/ 238 U ratios in two river waters [13]. The suitability of DGT for measuring the isotopic composition of Zn and Pb was investigated in laboratory studies [14, 15]. Sub-mm isotopic variations in dissolved sulfide-S in sediment porewaters were studied using DGT in combination with laser ablation MC ICP-MS [8, 16].…”

Section: Introductionmentioning

confidence: 99%

Diffusive gradients in thin films measurement of sulfur stable isotope variations in labile soil sulfate

et al. 2016

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A diffusive gradient in thin films (DGT) technique, based on a strongly basic anion exchange resin (Amberlite IRA-400), was successfully tested for 34 S/ 32 S analysis in labile soil sulfate. Separation of matrix elements (Na, K, and Ca) that potentially cause non-spectral interferences in 34 S/ 32 S analysis by MC ICP-MS (multi-collector inductively coupled plasma-mass spectrometry) during sampling of sulfate was demonstrated. No isotopic fractionation caused by diffusion or elution of sulfate was observed below a resin gel disc loading of ≤79 μg S. Above this threshold, fractionation towards 34 S was observed. The method was applied to 11 different topsoils and one mineral soil profile (0-100 cm depth) and compared with soil sulfate extraction by water. The S amount and isotopic ratio in DGT-S and water-extractable sulfate correlated significantly (r 2 = 0.89 and r 2 = 0.74 for the 11 topsoils, respectively). The systematically lower 34 S/ 32 S isotope ratios of the DGT-S were ascribed to mineralization of organic S.

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Section: Introductionmentioning

confidence: 99%

Diffusive gradients in thin films measurement of sulfur stable isotope variations in labile soil sulfate

et al. 2016

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Diffusive gradients in thin films for the measurement of labile metal species in water and soils: a review

et al. 2021

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The determination of the concentration of an environmental pollutant is not sufficient to assess the related health risk because this pollutant may not be bioavailable. Therefore, methods to determine pollutant bioavailability are more relevant to assess toxicity than measuring the total concentration. For instance, the diffusive gradient in thin films (DGT) is an in situ dynamic technique used to measure the concentration of labile compounds in the environment. Here we review the latest developments achieved in speciation and bioavailability of metals and metalloids using this technique. We detail the technique, common binding agents and diffusive gels. We give laboratory procedures to prepare the gels, and we explain calculations using the DGT-induced fluxes in soils (DIFS) modeling. DIFS models can predict the resupply capacities from soils to porewater, and the uptake of trace elements by plants. Procedures for in situ field deployments, including issues of biofilm growth, are also discussed.

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Elemental stable isotope assessment of groundwater contamination: Recent developments

Rodushkin

Pontér

Pennisi

2022

Current Opinion in Environmental Science & Health

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Using DGT Passive Samplers and MC-ICPMS to Determine Pb and Zn Isotopic Signature of Natural Water

Cited by 7 publications

References 6 publications

Diffusive gradients in thin films measurement of sulfur stable isotope variations in labile soil sulfate

Diffusive gradients in thin films measurement of sulfur stable isotope variations in labile soil sulfate

Diffusive gradients in thin films for the measurement of labile metal species in water and soils: a review

Elemental stable isotope assessment of groundwater contamination: Recent developments

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