Flow injection method for the determination of arsenic(III) at trace levels in alkaline media

Aldstadt, Joseph H.; Martin, Alice F.

doi:10.1039/an9962101387

Cited by 22 publications

(13 citation statements)

References 19 publications

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“…In situ film renewal is also possible [7]. In comparison with liquid mercury electrodes, solid electrodes are more easily assembled in flowthrough cells [7,69,74,78,101].…”

Section: Voltammetric Determination Of Arsenic At Trace Levelsmentioning

confidence: 98%

“…This is quite surprising, considering that some of the pretreatment steps considered above (As(III)-As(V) interconversion, UV and electrochemical digestion, SPE) can be easily implemented on-line. The advantages of on-line flow analysis with electrochemical detection are summarized by Aldstadt and Martin [101] in their work for the determination of arsenic by potentiometric stripping analysis, a technique that holds several similarities with stripping voltammetry. Among the features mentioned (higher sample throughput, improved precision, lower contamination and human error risks, enhanced chances of automation, lower sample and reagents consumption), exchange of the electrolytic medium between the electrodeposition and the stripping steps becomes straightforward.…”

Section: Voltammetry Coupled With Nonelectroanalytical Techniquesmentioning

confidence: 99%

See 1 more Smart Citation

Analysis and Speciation of Traces of Arsenic in Environmental, Food and Industrial Samples by Voltammetry: a Review

Cavicchioli¹,

La-Scalea

Gutz³

2004

Electroanalysis

103

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Voltammetric approaches for the determination of arsenic and speciation at trace levels are critically appraised in a review covering the literature from 1970 to 2002. Special attention is devoted to stripping modes and to issues related to the choice of working material and supporting electrolyte. A section is dedicated to the management of real samples and aspects of sample preparation. An extensive compilation, organized by real sample type, gathers essential experimental conditions. Potentiometric stripping analysis is introduced for sake of comparison. The coupling of voltammetric detection or preaccumulation with FIA, chromatography, capillary electrophoresis and ICP techniques is also addressed.

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“…In situ film renewal is also possible [7]. In comparison with liquid mercury electrodes, solid electrodes are more easily assembled in flowthrough cells [7,69,74,78,101].…”

Section: Voltammetric Determination Of Arsenic At Trace Levelsmentioning

confidence: 98%

Section: Voltammetry Coupled With Nonelectroanalytical Techniquesmentioning

confidence: 99%

Analysis and Speciation of Traces of Arsenic in Environmental, Food and Industrial Samples by Voltammetry: a Review

Cavicchioli¹,

La-Scalea

Gutz³

2004

Electroanalysis

103

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“…On the other hand, when arsenic was determined in a hydrochloric acid matrix, chlorine was generated at the auxiliary electrode concurrent with arsenic electrodepositon at the working electrode [25,26]. The chlorine would then diffuse to the working electrode where it would readily oxidize the gold electrode surface, there making it inactive.…”

Section: Selection Of Stripping Electrolytementioning

confidence: 99%

“…It is necessary to choose an appropriate electrodeposition time since elemental arsenic is not electrically conductive and once electrodeposited at an active electrode site, it passivates the location to further deposition of electroactive species [10,11,25,40,41] including more arsenic. Extensive deposition of arsenic on the film changes the film resistance and can alter the electrodeposition rate.…”

mentioning

confidence: 99%

Speciation of Arsenic by Potentiometric Stripping Analysis Using Gold(III) Solution as Chemical Reoxidant and a Wall‐Jet Flow Cell

Muñoz

Palmero

2004

Electroanalysis

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A simple procedure is described for the potentiometric stripping of arsenic with a wall-jet cell by means of potentiostatic co-deposition of gold and arsenic at a glassy-carbon electrode and subsequent chemical stripping with Au(III). Optimum medium containing 160 mg L À1 of Au(III) in HCl 0.1 M, where it is possible to speciate As(III) and As(V). As(V) was electrodeposited directly without prior chemical reduction at working electrode. As(III) was first determined at an electrodeposition potential of À 0.1 V. Afterwards, total arsenic was determined by an electrodeposition potential of À 0.7 V, from the area of peak obtained of the differential stripping potentiogram by using the standard addition method. The original As(V) concentration in the sample was calculated by difference. The possibilities of the optimized method were demonstrated by determinations of As(III), As(V) and total arsenic in samples of polluted water.

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“…This compound can be collected in vapor phase from the air and hydrolyzed to arsenite for SCP detection [49]. A degradation product of Lewisite can be also analyzed by stopped-flow FIA in basic medium [50].…”

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confidence: 99%

Stripping Chronopotentiometry in Environmental Analysis

et al. 2007

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A review with 101 references on the applications of stripping chronopotentiometry (SCP) to environmental analysis since its development in 1976 is presented. The references are classified into three categories: i) determination of total concentrations of elements, ii) element speciation analyses and iii) theoretical and experimental methods for the study of heavy metal complexation/speciation in the environment. Additionally, some concluding remarks are given and future perspectives of environmental SCP are discussed.

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Flow injection method for the determination of arsenic(III) at trace levels in alkaline media

Cited by 22 publications

References 19 publications

Analysis and Speciation of Traces of Arsenic in Environmental, Food and Industrial Samples by Voltammetry: a Review

Analysis and Speciation of Traces of Arsenic in Environmental, Food and Industrial Samples by Voltammetry: a Review

Speciation of Arsenic by Potentiometric Stripping Analysis Using Gold(III) Solution as Chemical Reoxidant and a Wall‐Jet Flow Cell

Stripping Chronopotentiometry in Environmental Analysis

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