Determination of arsenic by cathodic stripping voltammetry at a hanging mercury drop electrode

Kotouček, Milan; Vašicová, Jarmila; Růžička, Josef

doi:10.1007/bf01240167

Cited by 36 publications

(30 citation statements)

References 10 publications

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“…One was at ca þ 0.35 V (vs. SCE) due to underpotential dissolution of copper [16]. We suggest that the other at ca þ 0.30 V (vs. SCE) is the peak of the intermetallic compound of arsenic and copper, possible Cu 3 As 2 [12]. Next the same experiments were made on gold nanoparticle modified electrodes.…”

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confidence: 96%

Gold Nanoparticle Modified Electrodes Show a Reduced Interference by Cu(II) in the Detection of As(III) Using Anodic Stripping Voltammetry

2005

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Interference by Cu(II) causes serious problems in the detection of As(III) using anodic stripping voltammetry at gold electrodes. The behavior of Cu(II) and As(III) were examined at both a gold macro electrode and two kinds of gold nanoparticle modified electrodes, one where gold particles are deposited on glassy carbon (GC) and the other where basal plane pyrolytic graphite (BPPG) is the substrate. The sensitivity of As(III) detection was higher on gold nanoparticle modified electrodes than those on a macro gold electrode by up to an order of magnitude. In addition, the stripping peak of As(III) was narrower and more symmetric on a gold nanoparticle-modified GC electrode, leading to analytical data with a lower limit of detection. At a macro gold electrode, the peak currents of Cu(II) were higher than those on gold nanoparticle modified electrodes. Accordingly, through the use of gold nanoparticle modified electrodes, the effect of copper interference to the arsenic detection can be reduced.

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confidence: 96%

Gold Nanoparticle Modified Electrodes Show a Reduced Interference by Cu(II) in the Detection of As(III) Using Anodic Stripping Voltammetry

2005

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“…Dissolution with HCl/H 2 SO 4 ; distillation of AsCl 3 under vacuum; As( V ) 3 As( III ) with N 2 H 4 ¥ H 2 SO 4 for total As determination as As( III ) [86] ed as SO 2À 3 [12,14,50,73,102,133,138], HSO À 3 [49] or SO 2(g) [34,36,52,66]), S 2 O 2À 3 [70], hydrazine (added as sulfate or hydrochloride) on its own or in the presence of HBr [24,34,35,67,74,86,87,98], KI (sometimes in the presence of ascorbic acid) [65, 103, 110 ± 112, 114, 122, 123, 131] and hydroxylamine [135]. Dubey and Puri [64] claim that As(V) is reduced to As(III) during the solid-phase extraction of its morpholine-4-carbothioate complex onto naphthalene.…”

Section: Natural Watersmentioning

confidence: 99%

“…H 2 SO 4 is sometimes a substitute, on its own [34,35,113,122,123] or in the presence of mannitol [23,32,114]. Other exceptions include the following electrolytes: i) NaClO 4 /NaCl/ mannitol for the determination of As(V) [21]; ii) HCl/NaHCO 3 /KI for As(III) [65]; and iii) NH 4 Cl/NH 4 OH for As(III) [68,116].…”

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confidence: 96%

“…Confirmation on the formation of Cu 3 As on the HMDE surface was obtained by X-ray analysis [34]. Some works [34, 110 ± 112] showed that KI can enhance the effect of Cu(II) in HCl or H 2 SO 4 , possibly because it prevents oxidation of As(III) to As(V) during the determination.…”

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confidence: 99%

“…In isolated studies, other unusual voltammetric solutions have been proposed regarding: i) the type of supporting electrolyte (use of LaCl 3 to improve the wave profile [25] or LiClO 4 in acetonitrile [81]); ii) working electrode type (Cucoated glassy carbon [97]); iii) the form of the potential sweep curve (activated pulse amperometric detection for Pt electrodes [62]; fast scan differential pulse voltammetry [34]). …”

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confidence: 99%

See 2 more Smart Citations

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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Speciation of Inorganic Arsenic in Natural Waters by Square-Wave Cathodic Stripping Voltammetry

Barra

Santos²

2001

Electroanalysis

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Determination of arsenic by cathodic stripping voltammetry at a hanging mercury drop electrode

Cited by 36 publications

References 10 publications

Gold Nanoparticle Modified Electrodes Show a Reduced Interference by Cu(II) in the Detection of As(III) Using Anodic Stripping Voltammetry

Gold Nanoparticle Modified Electrodes Show a Reduced Interference by Cu(II) in the Detection of As(III) Using Anodic Stripping Voltammetry

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

Speciation of Inorganic Arsenic in Natural Waters by Square-Wave Cathodic Stripping Voltammetry

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