Selective reduction of arsenic species by continuous hydride generation. Part II. Validation of methods for application to natural waters

Anderson, Richard W.; Thompson, Michael; Culbard, E.

doi:10.1039/an9861101153

Cited by 47 publications

(11 citation statements)

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“…Arsenic was measured by hydride generation AAS (SIMAA 6000, PerkinElmer). Analytical differentiation between AsO 3 3− and AsO 4 3− was performed according to the method of Anderson et al (1986a,b) as follows: for AsO 3 3− measurements, solutions were buffered with acetate at pH 4.2. Before the analysis of total As, AsO 4 3− was reduced to AsO 3 3− with KI, ascorbic acid, and HCl overnight.…”

Section: Methodsmentioning

confidence: 99%

Arsenic Mobility and Speciation in a Gleysol with Petrogleyic Properties: A Field and Laboratory Approach

Mansfeldt

Overesch

2013

J. Environ. Qual.

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Naturally elevated levels of As have been observed in some ironenriched lowland soils of the southern Münsterland, Germany. To determine whether As is mobilized by the reductive dissolution of As-hosting Fe oxides at reducing soil conditions, the release of arsenate and arsenite was investigated in the field for 24 mo and in laboratory experiments. The grassland Gleysol consists of oximorphic soil horizons ( , respectively). Most of the petrogleyic Fe belonged to nanosized goethite, whereas ferrihydrite was dominant in the topsoil. Arsenic levels of 149 mg kg −1 were found in the topsoil. Levels peaked in the oximorphic soil horizons (626 and 999 mg kg ). Sequential fractionation revealed that 84 to 96% of the As in the oximorphic horizons was associated with Fe oxides. Water saturation in combination with soil temperatures above 5 to 10°C resulted in a fast decrease of the redox potential (up to −120 mV) and release of As (up to 35 mg L −1 ) with Fe into the soil solution only in the Ah horizon. Although the petrogleyic horizons were mostly water saturated with reducing conditions, no As release was observed. A lack of As mobilization was confirmed in experiments performed under fixed redox conditions; neither Fe nor As was released into solution at an appropriate redox potential. The As species distribution showed redox disequilibrium because arsenate was detected under reducing conditions and arsenite under oxidizing conditions. We conclude that microbial-mediated reductive dissolution of Fe oxides pushes the As mobilization in the topsoil; water saturation and soil temperature were key factors. The dominance of goethite, which is more resistant to microbial reduction, and/or the possible readsorption of released As onto remaining or newly formed Fe oxide surfaces is responsible for the absent As mobilization in the petrogleyic horizons.

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Section: Methodsmentioning

confidence: 99%

Arsenic Mobility and Speciation in a Gleysol with Petrogleyic Properties: A Field and Laboratory Approach

Mansfeldt

Overesch

2013

J. Environ. Qual.

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“…Some procedures for stabilization of arsenic species in water also involve EDTA [13,14]. EDTA has also been used as a masking agent to eliminate interferences from transition metals on the determination of arsenic by HGAAS [15][16][17][18][19]. The effect of EDTA on the generation of arsines has not been investigated, probably because of the assumption that arsenic does not form complexes with EDTA.…”

Section: Introductionmentioning

confidence: 99%

Influence of EDTA, carboxylic acids, amino- and hydroxocarboxylic acids and monosaccharides on the generation of arsines in hydride generation atomic absorption spectrometry

et al. 2008

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“…Van Cleuvenbergen et al [135] determined As(III) in Tris buffer (pH 7.5) and total arsenic at pH 0.8. Anderson et al [136] used phthalate buffer for As(III) reduction and oxalic acid for determining other species. Ryu et al [137] determined As(III) at pH 6, and total arsenic and methylated species were determined at pH 1.5 using oxalic acid.…”

Section: Hg-ct Techniquesmentioning

confidence: 99%

Non-chromatographic hydride generation atomic spectrometric techniques for the speciation analysis of arsenic, antimony, selenium, and tellurium in water samples—a review

Kumar

Riyazuddin

2007

International Journal of Environmental Analytical Chemistry

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Selective reduction of arsenic species by continuous hydride generation. Part II. Validation of methods for application to natural waters

Cited by 47 publications

References 0 publications

Arsenic Mobility and Speciation in a Gleysol with Petrogleyic Properties: A Field and Laboratory Approach

Arsenic Mobility and Speciation in a Gleysol with Petrogleyic Properties: A Field and Laboratory Approach

Influence of EDTA, carboxylic acids, amino- and hydroxocarboxylic acids and monosaccharides on the generation of arsines in hydride generation atomic absorption spectrometry

Non-chromatographic hydride generation atomic spectrometric techniques for the speciation analysis of arsenic, antimony, selenium, and tellurium in water samples—a review

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