Cited by 84Selenium in Biological SystemsAnalytical chemistry methods developmentHeavy metals in environment

Selenium speciation analysis at trace level in soils

Tolu, Julie, Le Hécho, Isabelle, Bueno, Maïté, Thiry, Yves, Potin-Gautier, Martine·2011·Analytica Chimica Acta

Abstract

This paper describes the development of an analytical methodology to determine speciation of selenium present in soils at trace level (μg kg(-1)). The methodology was based on parallel single extractions and high performance liquid chromatography hyphenated to inductively coupled plasma mass spectrometry (HPLC-ICPMS). Two complementary chromatographic separations were used to confirm Se species identity. Different extractants, selected on the basis of sequential extraction schemes, were compared. Ultrapure water, 0.1 molL(-1) phosphate buffer (KH(2)PO(4)/K(2)HPO(4)) at pH 7 and 0.1 molL(-1) sodium hydroxide extractants were finally chosen owing to their efficiency in extracting Se and compatibility with Se species stability. These extractants allow also assessing respectively water-soluble Se (i.e. the most mobile Se fraction), exchangeable Se (i.e. sorbed onto soil component surface) and Se bound to soil organic matter. This methodology gives thus information on Se mobility related to its distribution in soil with preservation of original Se speciation. Detection limits range from 3 to 29ng(Se)L(-1) and from 0.1 to 10 μg(Se)kg(-1), allowing determination of Se species concentrations in extracts from soils containing native Se at trace level. The methodology was applied to three soils with total Se concentrations between 210 and 1560 μg(Se)kg(-1).

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Crossref · 10.1016/j.aca.2010.10.044

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  • Many studies have reported large amounts of unidentified selenium fractions in soil extracts, up to 100%.

    “Many studies have reported large amounts of unidentified Se fractions in soil extracts, up to 100% [150,151,152,153].”

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Authors
Tolu, J., Le Hécho, I., Bueno, M., Thiry, Y., & Potin-Gautier, M.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • Agence Nationale pour la Gestion des Déchets Radioactifs (FR)
Venue
Analytica Chimica Acta
Publisher
Elsevier BV
Published
2011-01
Volume
684
Issue
1-2
Pages
126-133
ISSN
0003-2670 (ISSN-L)
OpenAlex
W2084161683
Cited by
83
References
44
Citations by year
2026: 4 · 2025: 2 · 2024: 4 · 2023: 13 · 2022: 3 · 2021: 7 · 2020: 5 · 2019: 6 · 2018: 3 · 2017: 8 · 2016: 3 · 2015: 6 · 2014: 7 · 2013: 2 · 2012: 6
FWCI
3.13
Type
journal article
Language
en
Open access
closed
Locations
  • Analytica Chimica Acta (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Funders
French national radioactive waste management agency (ANDRA)
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Selenium in Biological Systems
  • Physical Sciences › Chemistry › Analytical Chemistry › Analytical chemistry methods development
  • Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
Keywords
selenium speciation, soil selenium, trace-level analysis, sequential extraction, HPLC-ICP-MS, phosphate buffer extraction, sodium hydroxide extraction, selenium mobility, soil contamination
MeSH terms
Chromatography, High Pressure Liquid, Selenium, Soil, Mass Spectrometry, Limit of Detection

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