Determination of trace arsenic on hanging copper amalgam drop electrode

Piech, Robert; Baś, Bogusław; Niewiara, Ewa; Kubiak, Władysław W.

doi:10.1016/j.talanta.2006.12.008

Cited by 23 publications

(9 citation statements)

References 25 publications

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“…A similar shift of the peak potential was observed on the HMDE when copper(II) ions were added to the supporting electrolyte in micromolar quantities. Measurements carried out at the hanging copper amalgam drop electrode [36] give a peak potential similar to that in the case of the Hg(Cu)FE. When sulfur measurements are performed on the same surface (without refreshment), the analytical signal decreases.…”

Section: Renewable Amalgam Film Electrodesmentioning

confidence: 62%

Renewable Copper and Silver Amalgam Film Electrodes of Prolonged Application for the Determination of Elemental Sulfur Using Stripping Voltammetry

et al. 2008

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New, renewable copper (Hg(Cu)FE) and silver (Hg(Ag)FE) based amalgam film electrodes applied for the determination of elemental sulfur using differential pulse cathodic stripping voltammetry are presented. With surface areas adjustable from 1 to 12 mm 2 , both electrodes are characterized by very good surface reproducibility ( 2%) and long-term stability (a few thousand measurement cycles). The mechanical refreshing of the amalgam film takes about 1 -2 seconds. The effects of various factors such as instrumental parameters and the supporting electrolyte composition were optimized. Interferences from sulfides are easily removed by the addition of acid, and bubbling with argon, for Hg(Ag)FE. In the case of Hg(Cu)FE, sulfides did not interfere. The calibration graph is linear within the studied range from 16 ng L À1 to 4.8 mg L À1 for Hg(Cu)FE, and up to 6.4 mg L À1 for Hg(Ag)FE (t acc ¼ 15 s). The correlation coefficients for the two electrodes were at least 0.997. The detection limits for a low concentration of S(0) and t acc ¼ 60 s are as low as 14 ng L À1 for Hg(Cu)FE and 4 ng L À1 for Hg(Ag)FE. The proposed method was successfully applied and validated by studying the recovery of S(0) from spiked river water.

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Section: Renewable Amalgam Film Electrodesmentioning

confidence: 62%

Renewable Copper and Silver Amalgam Film Electrodes of Prolonged Application for the Determination of Elemental Sulfur Using Stripping Voltammetry

et al. 2008

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“…Dependence of the arsenic peak current on the deposition potential in a solution containing hydrochloric acid and copper ions has been studied many times and has been precisely described in the literature [6,7,24,34]. Concerning that the proposed procedure is optimized for samples containing surfactants the dependence of the arsenic peak current on the deposition potential in the presence of 1 mg…”

Section: Effect Of Deposition Potential and Timementioning

confidence: 99%

“…On the basis of this results the deposition potential of À 0.44 V was chosen as the most appropriate; this potential is also preferred for the solutions containing no surfactants and resin [24].…”

Section: Effect Of Deposition Potential and Timementioning

confidence: 99%

“…Therefore the need for voltammetric stripping procedures making arsenic determination in the presence of surfactants possible grows. Unfortunately, in most voltammetric procedures of arsenic speciation the influence of surfactants was not studied [6 -8] and, as Piech et al described [24] the voltammetric arsenic signal is almost completely suppressed in the presence of about 1.2 mg L À1 of surface active compounds. This paper provides a simple and fast procedure for determination of a highly toxic arsenic form, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…The mechanism of this procedure is well known, has been studied in numerous papers and described in detail [19, 25 -27]. This procedure is characterized by very good parameters and is still employed in new applications and modifications [19,24,28].…”

Section: Introductionmentioning

confidence: 99%

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Stripping Voltammetric Determination of As(III) in Natural Water Samples Containing Surface Active Compounds

Grabarczyk

2010

Electroanalysis

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A cathodic stripping voltammetric method for determination of As(III) using Hg electrode in water samples containing high concentrations of surfactants is described. The linear calibration plot for As(III) was achieved in the simultaneous presence of 1 mg L À1 anionic, 2 mg L À1 cationic and 2 mg L À1 nonionic surfactants for an accumulation time of 30 s in the range 1 Â 10 À8 to 1 Â 10 À5 mol L À1, the detection limit for accumulation time of 3 hours was about 2.6 Â 10 À9 mol L À1. The developed method was successfully applied to As(III) determination in five natural water samples with satisfactory results.

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Highly Sensitive Voltammetric Speciation and Determination of Inorganic Arsenic in Water and Alloy Samples Using Ammonium 2‐Amino‐1‐Cyclopentene‐1‐Dithiocarboxylate

Ensafi¹,

Ring²,

Fritsch³

2010

Electroanalysis

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A simple, fast, reproducible (2.5% RSD at 3.0 mg/L), and sensitive method is described for quantifying As(III) (0.3 mg/ L detection limit, 0.5 -440 mg/L dynamic range). Anodic stripping voltammetry (ASV) is performed after accumulating arsenic at a mercury film electrode at À 0.350 V vs. Ag/AgCl (saturated KCl) for 20 s in 0.2 M HCl containing 8 mM ammonium 2-amino-1-cyclopentene-1-dithiocarboxylate (AACD), without oxygen removal. This is the first report of using AACD in ASV and in electrochemical quantification of As(III). Total arsenic is determined after sodium-sulfite-reduction of As(V) to As(III). Interferences are minimal. Method validation involved water and metal alloy samples.

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Determination of trace arsenic on hanging copper amalgam drop electrode

Cited by 23 publications

References 25 publications

Renewable Copper and Silver Amalgam Film Electrodes of Prolonged Application for the Determination of Elemental Sulfur Using Stripping Voltammetry

Renewable Copper and Silver Amalgam Film Electrodes of Prolonged Application for the Determination of Elemental Sulfur Using Stripping Voltammetry

Stripping Voltammetric Determination of As(III) in Natural Water Samples Containing Surface Active Compounds

Highly Sensitive Voltammetric Speciation and Determination of Inorganic Arsenic in Water and Alloy Samples Using Ammonium 2‐Amino‐1‐Cyclopentene‐1‐Dithiocarboxylate

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