High-performance liquid chromatography with hydride generation/atomic absorption spectrometry for the determination of arsenic species with application to some water samples

Tye, C.; Haswell, Stephen J.; O’Neill, Peter; Bancroft, K. C. C.

doi:10.1016/s0003-2670(00)86221-2

Cited by 64 publications

(15 citation statements)

References 19 publications

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“…The relative stability of some arsenic species in a system including water, oxygen and sulphur is shown in Figure 2, in the form of an Eh-pH diagram. The arsenate [AsO43-]/(As(V)) form is relatively mobile and stable and found in oxidised systems such as freely draining acidic soils Tye et al, 1985). In contrast, arsenites [AsO33-]/(As(III)) dominate in reducing, anaerobic conditions.…”

Section: Geochemical Characteristics Of Arsenicmentioning

confidence: 99%

The nature and significance of public exposure to arsenic: a review of its relevance to South West England

Mitchell

Barre

1995

Environ Geochem Health

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In South West England, more than two hundred years of intensive exploitation of metalliferous ore deposits, combined with the natural processes of pedogenesis from mineral-rich parent rocks, has resulted in the creation of a aignificant area of arsenic-contaminated wastes and soils. The scale of arsenic dispersion by natural and anthropogenic processes is such that 722 km(2) of land contains concentrations of arsenic in excess of 110 μg g(-1), more than twice the maximum that might be expected in a normal soil.The general rationale for the clean-up of derelict and contaminated mining sites often includes aesthetic factors and the desirability of preventing the dispersion of contaminants beyond the site boundaries. Only in extreme cases is public health directly invoked as justification for remediation. In South West England, if arsenic constitutes a genuine threat to the public, an increased rate of site remediation would be justified. The primary purpose of this review is to establish whether or not widespread arsenic contamination (principally of soils) has any measurable effects on public health in South West England, and how this might affect current contaminated site remediation policy. The review is based on data from previous research in the region, and other relevant international studies of mining and smelting communities, and other populations exposed to elevated arsenic concentrations. The literature reviewed also includes the determination of the extent and sources of contamination, and pathways between source and man.While the contamination of potable waters in some countries has led to measurable health effects, this scenario has not yet been identified in South West England, and there is little reason to believe that significantly contaminated potable water supplies would escape detection for extended periods of time under the current monitoring regime.In relative terms (based on both globaland local data), one of the most significant links between contaminated soils and humans appears to be contaminated food stuffs. In absolute terms, such exposure is low due to the natural constraints on arsenic uptake by herbage, cereal crops and vegetables, and the food chain does not appear to have been significantly compromised in South West England. Chronic health effects are unlikely as excessive arsenic concentrations in locally grown food crops remain rare.With the problems of confounding medical and social factors, it is not surprising that studies in South West England have failed to identify chronic exposure to arsenic at very low concentrations as a significant health risk. Those studies that indicate otherwise do not stand up to close scrutiny. It appears that the number of additional deaths arising from the widespread arsenic contamination in South West England is small. The relative benefits of a costly statistical study to actually determine the number of additional deaths might be considered minimal, but one major area could benefit from further studies: the sensitivity of certain population sub-...

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Section: Geochemical Characteristics Of Arsenicmentioning

confidence: 99%

The nature and significance of public exposure to arsenic: a review of its relevance to South West England

Mitchell

Barre

1995

Environ Geochem Health

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“…The predominant forms of As in soil and water are as inorganic arsenate (As(V)) and arsenite (As(III)) (4)(5)(6)(7). Under oxidizing and aerobic conditions, the As(V) species predominates and exists as oxyanions of arsenic acid (H2AsO4 -and HAsO4 2-) (8).…”

Section: Introductionmentioning

confidence: 99%

Arsenic(III) Oxidation and Arsenic(V) Adsorption Reactions on Synthetic Birnessite

Manning

Fendorf

Bostick

et al. 2002

Environ. Sci. Technol.

582

430

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., "Arsenic(III) Oxidation and Arsenic(V) Adsorption Reactions on Synthetic Birnessite" (2002). Publications from USDA-ARS / UNL Faculty. 503. http://digitalcommons.unl.edu/usdaarsfacpub/503 The oxidation of arsenite (As(III)) by manganese oxide is an important reaction in both the natural cycling of As and the development of remediation technology for lowering the concentration of dissolved As(III) in drinking water. This study used both a conventional stirred reaction apparatus and extended X-ray absorption fine structure (EXAFS) spectroscopy to investigate the reactions of As(III) and As(V) with synthetic birnessite (MnO 2 ). Stirred reactor experiments indicate that As(III) is oxidized by MnO 2 followed by the adsorption of the As(V) reaction product on the MnO 2 solid phase. The As(V)-Mn interatomic distance determined by EXAFS analysis for both As(III)-and As(V)-treated MnO 2 was 3.22 Å, giving evidence for the formation of As(V) adsorption complexes on MnO 2 crystallite surfaces. The most likely As(V)-MnO 2 complex is a bidentate binuclear corner sharing (bridged) complex occurring at MnO 2 crystallite edges and interlayer domains. In the As(III)-treated MnO 2 systems, reductive dissolution of the MnO 2 solid during the oxidation of As(III) caused an increase in the adsorption of As(V) when compared with As(V)-treated MnO 2 . This suggested that As(III) oxidation caused a surface alteration, creating fresh reaction sites for As(V) on MnO 2 surfaces. Arsenic(III) Oxidation and Arsenic(V) Adsorption Reactions on Synthetic Birnessite

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“…These include ion chromatography (IC) and high performance liquid chromatography (HPLC) combined with hydride generation atomic absorption spectrometry or inductively coupled plasma mass spectrometry (ICP-MS). [3][4][5][6][7][8][9][10][11][12][13] HPLC-ICP-MS is widely applied to arsenic speciation because it provides the advantages of excellent separation and high sensitivity. Methods using reversed phase columns for HPLC and ion exchange columns for IC, coupled with ICP-MS, are widely used.…”

Section: Introductionmentioning

confidence: 99%

Reversed Phase Column HPLC-ICP-MS Conditions for Arsenic Speciation Analysis of Rice Flour

Narukawa¹,

Matsumoto

Nishimura

et al. 2015

ANAL. SCI.

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New measurement conditions for arsenic speciation analysis of rice flour were developed using HPLC-ICP-MS equipped with a reversed phase ODS column. Eight arsenic species, namely, arsenite [As(III)], arsenate [As(V)], monomethylarsonic acid (MMAA), dimethylarsinic acid (DMAA), trimethylarsine oxide (TMAO), tetramethylarsonium (TeMA), arsenobetaine (AsB) and arsenocholine (AsC), were separated and determined under the proposed conditions. In particular, As(III) and MMAA and DMAA and AsB were completely separated using a newly proposed eluent containing ammonium dihydrogen phosphate. Importantly, the sensitivity changes, in particular those of As(V) and As(III) caused by coexisting elements and by complex matrix composition, which had been problematical in previously reported methods, were eliminated. The new eluent can be applied to C8, C18 and C30 ODS columns with the same effectiveness and with excellent repeatability. The proposed analytical method was successfully applied to extracts of rice flour certified reference materials.

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High-performance liquid chromatography with hydride generation/atomic absorption spectrometry for the determination of arsenic species with application to some water samples

Cited by 64 publications

References 19 publications

The nature and significance of public exposure to arsenic: a review of its relevance to South West England

The nature and significance of public exposure to arsenic: a review of its relevance to South West England

Arsenic(III) Oxidation and Arsenic(V) Adsorption Reactions on Synthetic Birnessite

Reversed Phase Column HPLC-ICP-MS Conditions for Arsenic Speciation Analysis of Rice Flour

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