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Leyden E, Farkas J, Gilbert S, Hutson J, Mosley LM. A simple and rapid ICP-MS/MS determination of sulfur isotope ratios ( 34S/ 32S) in complex natural waters: A new tool for tracing seawater intrusion in coastal systems. Talanta 2021; 235:122708. [PMID: 34517581 DOI: 10.1016/j.talanta.2021.122708] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 07/06/2021] [Accepted: 07/09/2021] [Indexed: 11/29/2022]
Abstract
Conventional sulfur isotope measurements in complex natural liquid or solid samples via GS-IRMS are complicated, time consuming and relatively expensive. Here we assessed a novel 'collision cell' based ICP-MS/MS approach which can determine the sulfur isotope abundances (i.e., 34S/32S ratios, expressed as δ34S) in complex coastal waters rapidly, accurately and with minimal sample preparation. The approach was validated via repeated ICP-MS/MS measurement of S isotope certified reference materials (CRM) providing accurate and reproducible results, with a typical uncertainty on δ34S of around 1.1-1.5‰ (1SD). This novel approach is suitable for water samples with sulfur concentrations at or above 2 μg/mL (ppm). Matrix matching between samples and the CRM was necessary when seawater-like solutions were analysed addressing common matrix related errors. The ICP-MS/MS approach was used to investigate δ34S signature of porewaters from a variety of coastal systems in South Australia (including acid sulfate soils), and how they responded to progressive seawater inundation. Importantly, inundation induced a shift in S isotope ratio in affected porewaters in which δ34S approached that of seawater. The simple sample preparation, with rapid and accurate δ34S determination of complex natural waters using the ICP MS/MS approach, greatly increases the applicability of sulfur isotope tracing studies to identify and monitor sources and bio-geochemical pathways of S in coastal and near-surface environments.
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Affiliation(s)
- Emily Leyden
- School of Biological Sciences, The University of Adelaide, Adelaide, Australia.
| | - Juraj Farkas
- School of Physical Sciences, Department of Earth Sciences, Metal Isotope Group (MIG), The University of Adelaide, Adelaide, Australia
| | - Sarah Gilbert
- Adelaide Microscopy, Division of Research and Innovation, The University of Adelaide, Adelaide, Australia
| | - John Hutson
- College of Science and Engineering, Flinders University, Adelaide, Australia
| | - Luke M Mosley
- School of Biological Sciences, The University of Adelaide, Adelaide, Australia
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Yang LW, Liu C, Yang T. An evaluation on the extraction capability of anion exchange membranes for high-precision sulfur isotope measurement by multiple-collector inductively coupled plasma mass spectrometry. RSC Adv 2019; 9:31224-31232. [PMID: 35527964 PMCID: PMC9072498 DOI: 10.1039/c9ra04121d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 09/23/2019] [Indexed: 11/21/2022] Open
Abstract
Anion exchange membranes (AEMs) are adept at extracting sulfate for sulfur isotope analyses by multiple-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) from natural samples typically with low sulfate concentrations.
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Affiliation(s)
- Liu Willow Yang
- State Key Laboratory for Mineral Deposits Research
- School of Earth Sciences and Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Chenhui Liu
- State Key Laboratory for Mineral Deposits Research
- School of Earth Sciences and Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Tao Yang
- State Key Laboratory for Mineral Deposits Research
- School of Earth Sciences and Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
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Liu C, Bian XP, Yang T, Lin AJ, Jiang SY. Matrix effects of calcium on high-precision sulfur isotope measurement by multiple-collector inductively coupled plasma mass spectrometry. Talanta 2016; 151:132-140. [PMID: 26946020 DOI: 10.1016/j.talanta.2016.01.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 12/30/2015] [Accepted: 01/08/2016] [Indexed: 11/29/2022]
Abstract
Multiple-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) has been successfully applied in the rapid and high-precision measurement for sulfur isotope ratios in recent years. During the measurement, the presence of matrix elements would affect the instrumental mass bias for sulfur and these matrix-induced effects have aroused a lot of researchers' interest. However, these studies have placed more weight on highlighting the necessity for their proposed correction protocols (e.g., chemical purification and matrix-matching) while less attention on the key property of the matrix element gives rise to the matrix effects. In this study, four groups of sulfate solutions, which have different concentrations of sulfur (0.05-0.60mM) but a constant sequence of atomic calcium/sulfur ratios (0.1-50), are investigated under wet (solution) and dry (desolvation) plasma conditions to make a detailed evaluation on the matrix effects from calcium on sulfur isotope measurement. Based on a series of comparative analyses, we indicated that, the matrix effects of calcium on both measured sulfur isotope ratios and detected (32)S signal intensities are dependent mainly on the absolute calcium concentration rather than its relative concentration ratio to sulfur (i.e., atomic calcium/sulfur ratio). Also, for the same group of samples, the matrix effects of calcium under dry plasma condition are much more significant than that of wet plasma. This research affords the opportunity to realize direct and relatively precise sulfur isotope measurement for evaporite gypsum, and further provides some suggestions with regard to sulfur isotope analytical protocols for sedimentary pore water.
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Affiliation(s)
- Chenhui Liu
- State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, PR China; Collaborative Innovation Center of South China Sea Studies, Nanjing University, Nanjing 210093, PR China
| | - Xiao-Peng Bian
- State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, PR China; Collaborative Innovation Center of South China Sea Studies, Nanjing University, Nanjing 210093, PR China
| | - Tao Yang
- State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, PR China; Beijing SHRIMP Center, Institute of Geology Chinese Academy of Geological Sciences, Beijing 102206, PR China; Collaborative Innovation Center of South China Sea Studies, Nanjing University, Nanjing 210093, PR China.
| | - An-Jun Lin
- State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, PR China; Thermo Fisher Scientific China Co., Ltd, Guangzhou 510030, PR China
| | - Shao-Yong Jiang
- State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, PR China; State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, PR China; Faculty of Earth Resources and Collaborative Innovation Center for Scarce and Strategic Mineral Resources, China University of Geosciences, Wuhan 430074, PR China
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In situ sulfur isotopes (δ 34 S and δ 33 S) analyses in sulfides and elemental sulfur using high sensitivity cones combined with the addition of nitrogen by laser ablation MC-ICP-MS. Anal Chim Acta 2016; 911:14-26. [DOI: 10.1016/j.aca.2016.01.026] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 01/11/2016] [Accepted: 01/14/2016] [Indexed: 11/18/2022]
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Hanousek O, Berger TW, Prohaska T. MC ICP-MS δ(34)S(VCDT) measurement of dissolved sulfate in environmental aqueous samples after matrix separation by means of an anion exchange membrane. Anal Bioanal Chem 2015; 408:399-407. [PMID: 26438477 PMCID: PMC4709390 DOI: 10.1007/s00216-015-9053-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 09/14/2015] [Accepted: 09/15/2015] [Indexed: 12/03/2022]
Abstract
Analysis of 34S/32S of sulfate in rainwater and soil solutions can be seen as a powerful tool for the study of the sulfur cycle. Therefore, it is considered as a useful means, e.g., for amelioration and calibration of ecological or biogeochemical models. Due to several analytical limitations, mainly caused by low sulfate concentration in rainwater, complex matrix of soil solutions, limited sample volume, and high number of samples in ecosystem studies, a straightforward analytical protocol is required to provide accurate S isotopic data on a large set of diverse samples. Therefore, sulfate separation by anion exchange membrane was combined with precise isotopic measurement by multicollector inductively coupled plasma mass spectrometry (MC ICP-MS). The separation method proved to be able to remove quantitatively sulfate from matrix cations (Ca, K, Na, or Li) which is a precondition in order to avoid a matrix-induced analytical bias in the mass spectrometer. Moreover, sulfate exchange on the resin is capable of preconcentrating sulfate from low concentrated solutions (to factor 3 in our protocol). No significant sulfur isotope fractionation was observed during separation and preconcentration. MC ICP-MS operated at edge mass resolution has enabled the direct 34S/32S analysis of sulfate eluted from the membrane, with an expanded uncertainty U (k = 2) down to 0.3 ‰ (a single measurement). The protocol was optimized and validated using different sulfate solutions and different matrix compositions. The optimized method was applied in a study on solute samples retrieved in a beech (Fagus sylvatica) forest in the Vienna Woods. Both rainwater (precipitation and tree throughfall) and soil solution δ34SVCDT ranged between 4 and 6 ‰, the ratio in soil solution being slightly lower. The lower ratio indicates that a considerable portion of the atmospherically deposited sulfate is cycled through the organic S pool before being released to the soil solution. Nearly the same trends and variations were observed in soil solution and rainwater δ34SVCDT values showing that sulfate adsorption/desorption are not important processes in the studied soil. Sulfate separation by means of an anion exchange resin on a plastic membrane ![]()
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Affiliation(s)
- Ondrej Hanousek
- VIRIS Laboratory, Department of Chemistry, University of Natural Resources and Life Sciences Vienna, Konrad-Lorenz-Strasse 24, 3430, Tulln, Austria.,Institute of Forest Ecology, Department of Forest- and Soil Sciences, University of Natural Resources and Life Sciences Vienna, Peter-Jordan-Strasse 82, 1190, Vienna, Austria
| | - Torsten W Berger
- Institute of Forest Ecology, Department of Forest- and Soil Sciences, University of Natural Resources and Life Sciences Vienna, Peter-Jordan-Strasse 82, 1190, Vienna, Austria
| | - Thomas Prohaska
- VIRIS Laboratory, Department of Chemistry, University of Natural Resources and Life Sciences Vienna, Konrad-Lorenz-Strasse 24, 3430, Tulln, Austria.
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