Selenium analysis in waters. Part 2: Speciation methods

LeBlanc, Kelly L.; Kumkrong, Paramee; Mercier, Patrick H. J.; Mester, Zoltán

doi:10.1016/j.scitotenv.2018.05.394

Cited by 41 publications

(16 citation statements)

References 158 publications

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“…Furthermore, using analytical instruments for Se analysis should take into consideration many quality control measures. Indeed, detection limits depend on the detector type, pre-concentration efficiency, and injection volume and it should be determined by analyzing at least three blanks (Table 4) (Kumkrong et al, 2018;LeBlanc et al, 2018). The analytical reproducibility should be ensured by analyzing samples to replicate and avoiding the problem of matrix interferences.…”

Section: Recommendations For Se Monitoring In Mine Industrymentioning

confidence: 99%

Monitoring and analysis of selenium as an emerging contaminant in mining industry: A critical review

Etteieb

Magdouli

Zolfaghari

et al. 2020

Science of The Total Environment

159

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Section: Recommendations For Se Monitoring In Mine Industrymentioning

confidence: 99%

Monitoring and analysis of selenium as an emerging contaminant in mining industry: A critical review

Etteieb

Magdouli

Zolfaghari

et al. 2020

Science of The Total Environment

159

View full text Add to dashboard Cite

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“…Determination of the total selenium content is still the first step of its analysis. This procedure requires that organic forms must be transferred into inorganic selenium that is usually achieved with digestion using strong mineral acids or UV irradiation after addition of hydrogen peroxide [12,34]. For this purpose, fluorometry, electrochemical detectors, atomic absorption spectrometry (AAS), atomic fluorescence spectrometry (AFS), mass spectrometry (MS), and neutron activation analysis have been used ( Table 2).…”

Section: Total Selenium Determinationmentioning

confidence: 99%

“…Several analytical procedures for determination of selenium at low concentration levels in environmental samples have been proposed and recently reviewed [11,12]. For selenium speciation analysis, the coupling of chromatographic techniques such as gas chromatography (GC) or high-performance liquid chromatography (HPLC) with a highly sensitive and selective detector is very useful [13].…”

Section: Introductionmentioning

confidence: 99%

Chromatographic Analysis of Selenium Species

Sentkowska¹

2020

Importance of Selenium in the Environment and Human Health

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Selenium is an important element in environmental and living organisms that is being essential in very narrow concentration range, while deficiency or toxicity occurs outside this range. However, its toxicity depends not only on its dose but also on its chemical form. In environmental samples, selenium can exist in inorganic forms (as elemental selenium, metal selenides, selenite, or selenate anions) and as organic species with direct C-Se bonds (methylated compounds, selenoaminoacids, and selenoproteins). Thus, the development of reliable techniques to study the speciation of selenium in environmental samples is necessary. The main purpose of this chapter is to provide an update on the recent literature concerning the strategies for selenium speciation in environmental samples. Liquid chromatography coupled with sensitive detector is a commonly used technique for selenium separation. Gas chromatography can also be applied for such purpose; however derivatization step is usually required before analysis. Direct determination of selenium species at the concentration levels present in natural samples is very often difficult or even impossible. For this, several preconcentration/separation procedures for selenium have been proposed, including coprecipitation, extraction into an organic solvent, or application of solid sorbents.

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“…Liquid chromatography operating in different modes is the most used technique in selenium speciation analysis [ 25 , 26 , 27 ]. In anion-exchange chromatography the Hamilton PRP-X100 column is typically used, but SeCys 2 and SeMetO coelute prevented their clear discrimination [ 19 , 20 , 21 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Analytical Problems in Separation of Selenomethionine and Its Oxidative Product in HILIC HPLC

Sentkowska

Pyrzyńska

2021

Molecules

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Selenomethionine (SeMet) is one of the main selenium forms in foods and supplements. Determining its presence in natural food samples creates difficulties due to possible oxidation processes. The objective of this study was to evaluate the possible degradation of SeMet in water extracts of green teas, one of the most consumed beverages worldwide. Such a medium has not been investigated at this time. The HILIC-HPLC MS/MS method with different stationary phases was used to achieve the satisfactory separation of SeMet and selenomethionine oxide (SeMetO). The addition of dithiothreitol and β-mercaptoethanol, recommended to ensure that SeMet is kept in the reduced form, was also evaluated. The best separation was achieved using the zwitterionic HILIC stationary phase coupled to mass spectrometry and MeOH with water (85/15, v/v) as the eluent. Extraction was done with hot water with the addition of β-mercaptoethanol. The infusions prepared from Lung-Ching teas (from the Zhejiang Province in China) contained the highest concentration of selenium in a typical cup of tea (12.5–17.3 µg L−1). For other tested teas it decreased in the following order: Yunnan > Dilmah > Lipton. For Lung-Ching teas, the sum of concentrations of SeMet and SeMetO corresponded to about 46–63% of the total selenium in their extracts.

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Selenium analysis in waters. Part 2: Speciation methods

Cited by 41 publications

References 158 publications

Monitoring and analysis of selenium as an emerging contaminant in mining industry: A critical review

Monitoring and analysis of selenium as an emerging contaminant in mining industry: A critical review

Chromatographic Analysis of Selenium Species

Analytical Problems in Separation of Selenomethionine and Its Oxidative Product in HILIC HPLC

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