Solid phase extraction for the speciation and preconcentration of inorganic selenium in water samples: A review

Herrero-Latorre, Carlos; García, Julia Barciela; Martín, S. García; Crecente, R.M. Peña

doi:10.1016/j.aca.2013.09.054

Cited by 111 publications

(35 citation statements)

References 73 publications

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“…This limits the application space of the separation to those with only low-millimolar chloride content, with selenium concentrations high enough to undergo significant dilution, or to applications amendable to extraction/preconcentration procedures (which are frequently used for selenium monitoring). 9 One way to curb this limitation is to develop an optimized conductivity detector for MCE. The current detector is limited by a digital–analog conversion.…”

Section: Resultsmentioning

confidence: 99%

“…7,8 Examples include electrothermal atomic absorption spectrometry (ETAAS), inductively coupled plasma with optical emission spectrometry or mass spectrometry (ICP-OES and ICP-MS), differential pulse cathodic sweeping voltammetry (DPCSV), hydride generation atomic absorption and atomic fluorescence spectrometries (HGAAS and HGAFS), and UV–visible absorbance spectroscopy (after complexation). 8,9 Despite the sensitive, selective, and expensive methods employed for selenium speciation, preconcentration methods such as solid-phase extraction (SPE) are generally required to increase concentrations and/or reduce matrix interference. 9 …”

mentioning

confidence: 99%

“…8,9 Despite the sensitive, selective, and expensive methods employed for selenium speciation, preconcentration methods such as solid-phase extraction (SPE) are generally required to increase concentrations and/or reduce matrix interference. 9 …”

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confidence: 99%

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Sensitive, Selective Analysis of Selenium Oxoanions Using Microchip Electrophoresis with Contact Conductivity Detection

et al. 2014

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The common selenium oxoanions selenite (SeO32–) and selenate (SeO42–) are toxic at intake levels slightly below 1 mg day–1. These anions are currently monitored by a variety of traditional analytical techniques that are time-consuming, expensive, require large sample volumes, and/or lack portability. To address the need for a fast and inexpensive analysis of selenium oxoanions, we present the first microchip capillary zone electrophoresis (MCE) separation targeting these species in the presence of chloride, sulfate, nitrate, nitrite, chlorate, sulfamate, methanesulfonate, and fluoride, which can be simultaneously monitored. The chemistry was designed to give high selectivity in nonideal matrices. Interference from common weak acids is avoided by operating near pH 4. Separation resolution from chloride was enhanced to improve tolerance of high-salinity matrices. As a result, selenate can be quantified in the presence of up to 1.5 mM NaCl, and selenite analysis is even more robust against chloride. Using contact conductivity detection, detection limits for samples with conductivity equal to the background electrolyte are 53 nM (4.2 ppb Se) and 380 nM (30 ppb) for selenate and selenite, respectively. Analysis time, including injection, is ∼2 min. The MCE method was validated against ion chromatography (IC) using spiked samples of dilute BBL broth and slightly outperformed the IC in accuracy while requiring <10% of the analysis time. The applicability of the technique to real samples was shown by monitoring the consumption of selenite by bacteria incubated in LB broth.

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Section: Resultsmentioning

confidence: 99%

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Sensitive, Selective Analysis of Selenium Oxoanions Using Microchip Electrophoresis with Contact Conductivity Detection

et al. 2014

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“…Following preconcentration, the different species are separated (for instance, via gas- or liquid-chromatography) and detected in the laboratory. Extensive reviews of hyphenated preconcentration- and speciation-methods for the quantification of Se [27]–[30], As [28], [29], [31], [32], and S [15], [16] are available in the literature, and a short overview is given in Table S1 in Supporting Information File S1.…”

Section: Introductionmentioning

confidence: 99%

Quantification of Methylated Selenium, Sulfur, and Arsenic in the Environment

et al. 2014

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Biomethylation and volatilization of trace elements may contribute to their redistribution in the environment. However, quantification of volatile, methylated species in the environment is complicated by a lack of straightforward and field-deployable air sampling methods that preserve element speciation. This paper presents a robust and versatile gas trapping method for the simultaneous preconcentration of volatile selenium (Se), sulfur (S), and arsenic (As) species. Using HPLC-HR-ICP-MS and ESI-MS/MS analyses, we demonstrate that volatile Se and S species efficiently transform into specific non-volatile compounds during trapping, which enables the deduction of the original gaseous speciation. With minor adaptations, the presented HPLC-HR-ICP-MS method also allows for the quantification of 13 non-volatile methylated species and oxyanions of Se, S, and As in natural waters. Application of these methods in a peatland indicated that, at the selected sites, fluxes varied between 190–210 ng Se·m−2·d−1, 90–270 ng As·m−2·d−1, and 4–14 µg S·m−2·d−1, and contained at least 70% methylated Se and S species. In the surface water, methylated species were particularly abundant for As (>50% of total As). Our results indicate that methylation plays a significant role in the biogeochemical cycles of these elements.

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“…[13][14][15][16][17][18] Therefore,the treatment of SeO 3 2À is the key to handling Se species in aqueous solution. [13][14][15][16][17][18] Therefore,the treatment of SeO 3 2À is the key to handling Se species in aqueous solution.…”

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Selective Capture of Toxic Selenite Anions by Bismuth‐based Metal–Organic Frameworks

et al. 2018

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Chemically durable and effective absorbent materials for selenite (SeO 3 2À )r emain highly desirable for contamination remediation. Now ab ismuth-based metal-organic framework (Bi-MOF,C AU-17) was used as adsorbent to capture SeO 3 2À anions from aqueous solution with ultrahigh adsorption capacity of 255.3 mg g À1 and fast kinetics.F urthermore,the adsorbent showed excellent selectivity for SeO 3 2À and was able to work steadily in abroad pH range of 4-11. Density functional theory (DFT) calculation, XANES modeling,a nd EXAFS fitting suggested that SeO 3 2À anions were immobilized by forming BiÀOÀSe bonds (T-3 structural model) though splitting the O À Bi À Ob ond in the crystal structure,l eading to astructural transformation of CAU-17 in the solid state.Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

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Solid phase extraction for the speciation and preconcentration of inorganic selenium in water samples: A review

Cited by 111 publications

References 73 publications

Sensitive, Selective Analysis of Selenium Oxoanions Using Microchip Electrophoresis with Contact Conductivity Detection

Sensitive, Selective Analysis of Selenium Oxoanions Using Microchip Electrophoresis with Contact Conductivity Detection

Quantification of Methylated Selenium, Sulfur, and Arsenic in the Environment

Selective Capture of Toxic Selenite Anions by Bismuth‐based Metal–Organic Frameworks

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