l-cysteine-induced degradation of organic mercury as a novel interface in the HPLC-CV-AFS hyphenated system for speciation of mercury

Wang, Zhenhua; Yin, Yongguang; He, Bin; Shi, Jianbo; Liu, Jingfu; Jiang, Guibin

doi:10.1039/b924291k

Cited by 60 publications

(40 citation statements)

References 33 publications

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“…Wang et al [91] recently found that MeHg can be transformed to Hg 0 directly by reacting with KBH 4 and HCl in the presence of L-cysteine. This L-cysteine-induced degradation of organomercurials was used in the HPLC-CVG-AFS hyphenated system for speciation of mercury.…”

Section: Rp-hplc-icp-ms Rp-hplc-esi-msmentioning

confidence: 99%

Recent advances in speciation analysis of mercury, arsenic and selenium

2012

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Mercury (Hg), arsenic (As) and selenium (Se) are ubiquitous in the environment and exist in a variety of species, which have great influence on their transport, bioaccumulation and toxicity. This review presents the recent research progress in speciation analysis of Hg, As, and Se, with emphasis on enhanced cold vapor generation as interface for liquid chromatography and atomic spectrometry, speciation of volatile species in gas phase, and isotope dilution technique to improve the precision and accuracy of speciation. Hyphenated techniques to characterize the complexes of Hg and As with phytochelatins and chromatographic separation coupled with multi-collector-inductively coupled plasma mass spectrometry to measure species-specific isotopic ratios, are also briefly discussed. Mercury (Hg) and arsenic (As) are among the most highly toxic elements for humans and ecosystems and can cause serious environmental and human health problems even at low concentrations [1,2]. Selenium (Se) is an "essential toxin" for human health. It has been recognized as an important antioxidant and anti-cancer element. However, Se can also pose negative impact such as defective skin and hair loss [3]. The adsorption/uptake, transport, bioaccumulation, metabolism and toxicity of these elements strongly depend on their chemical species present in environmental and biological samples. In the environment, one species can transform to another through chemical or biological processes. For example, in anaerobic sediments, sulfur-reducing or iron-reducing bacteria can methylate inorganic mercury into highly toxic methylmercury (MeHg) [4,5]. Therefore, speciation analysis of Hg, As and Se is of great importance in order to elucidate the biogeochemcal cycle and toxicology of these elements. Speciation analysis mainly involves chromatographic separation (gas chromatography (GC) or high performance liquid chromatography (HPLC)) hyphenated with element-specific spectrometry or molecular mass spectrometry. This review presents the recent advances in speciation analysis of Hg, As, and Se based on chromatographic separation, with emphasis on enhanced cold vapor generation (CVG) as interface for LC and atomic spectrometry, speciation of volatile Hg, As and Se in gas phase, and isotope dilution technique to improve the precision and accuracy of speciation. Hyphenated techniques to characterize the complexes of Hg and As with phytochelatins and chromatographic separation coupled with multi-collector-inductively coupled plasma mass spectrometry (MC-ICP-MS) to measure species-specific isotopic ratios, are also briefly introduced.

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Section: Rp-hplc-icp-ms Rp-hplc-esi-msmentioning

confidence: 99%

Recent advances in speciation analysis of mercury, arsenic and selenium

2012

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“…The HPLC-ICP-MS hyphenated system was used to determine Hg 2+ and MeHg in the filtered solutions, and the detailed instrumentation and procedure could refer to our previous study [31].…”

Section: Adsorption Experimentsmentioning

confidence: 99%

Removal of Hg²⁺ and methylmercury in waters by functionalized multi-walled carbon nanotubes: adsorption behavior and the impacts of some environmentally relevant factors

Zhang

Yin

Liu

2017

Chemical Speciation & Bioavailability

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Adsorption of Hg2+ and methylmercury (MeHg) to multi-walled carbon nanotubes (MWCNTs) modified, respectively, with hydroxyl, amine and carboxyl groups was studied. The effect of various factors like the initial pH, natural organic matter (NOM), Cl -and adsorbent dose on the sorption efficiency were evaluated. It was found that amine-modified MWCNTs showed a strong adsorption capacity to Hg 2+ and MeHg, and the removal efficiency could reach up to 92% (0.5 g/L MWCNTs, and 100 μg/L Hg 2+ and MeHg) which is independent of pH.

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“…A simple on-line high performance liquid chromatography cold vapor generation atomic fluorescence spectrometry (HPLC-CV-AFS) method by adding L-cysteine into the mobile phase was used and the parameters which could influence the chromatographic separation and the fluorescence signals have been optimized in our previous work [25]. In brief, the mobile phase of HPLC was 1 g L À 1 L-cysteine and 0.06 mol L À 1 ammonium acetate in water at a flow rate of 1 mL min À 1 .…”

Section: Optimization Of Hplc-cv-afs Parametersmentioning

confidence: 99%

“…Speciation of mercury species was performed by HPLC-CV-AFS, which has previously been successfully applied to analyzing Hg in samples such as certified reference material (DORM-2, dogfish muscle) and biological samples [25].…”

Section: Total Mercury Determination and Speciation Of Mercurymentioning

confidence: 99%

Evaluation of different extraction procedures for determination of organic Mercury species in petroleum by high performance liquid chromatography coupled with cold vapor atomic fluorescence spectrometry

Yun¹,

He²,

Wang³

et al. 2013

Talanta

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l-cysteine-induced degradation of organic mercury as a novel interface in the HPLC-CV-AFS hyphenated system for speciation of mercury

Cited by 60 publications

References 33 publications

Recent advances in speciation analysis of mercury, arsenic and selenium

Recent advances in speciation analysis of mercury, arsenic and selenium

Removal of Hg²⁺ and methylmercury in waters by functionalized multi-walled carbon nanotubes: adsorption behavior and the impacts of some environmentally relevant factors

Evaluation of different extraction procedures for determination of organic Mercury species in petroleum by high performance liquid chromatography coupled with cold vapor atomic fluorescence spectrometry

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l-cysteine-induced degradation of organic mercury as a novel interface in the HPLC-CV-AFS hyphenated system for speciation of mercury

Cited by 60 publications

References 33 publications

Recent advances in speciation analysis of mercury, arsenic and selenium

Recent advances in speciation analysis of mercury, arsenic and selenium

Removal of Hg2+ and methylmercury in waters by functionalized multi-walled carbon nanotubes: adsorption behavior and the impacts of some environmentally relevant factors

Evaluation of different extraction procedures for determination of organic Mercury species in petroleum by high performance liquid chromatography coupled with cold vapor atomic fluorescence spectrometry

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Removal of Hg²⁺ and methylmercury in waters by functionalized multi-walled carbon nanotubes: adsorption behavior and the impacts of some environmentally relevant factors