Constant current cathodic stripping potentiometric determination of arsenic on a mercury film electrode in the presence of copper ions

Adeloju, Samuel B O; Young, T.M.; Jagner, Daniel; Batley, Graeme E.

doi:10.1016/s0003-2670(98)00700-4

Cited by 48 publications

(23 citation statements)

References 18 publications

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“…Higher acid solutions were not considered thus preventing degradation of the flow cell and minimizing the generation of acidic waste. Besides, concentrations higher than 2 M HCl offered no significant increase in the peak, yielding very broad peaks [26] and more irreproducibility possibly due to adsorbed chloride on the gold substrate [8].…”

mentioning

confidence: 95%

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

Muñoz¹,

Palmero²

2004

Electroanalysis

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In the proposed method As(III) is determined with a wall-jet flow cell by means of potentiostatic co-deposition of Au(III) and As(III) at a glassy-carbon electrode and subsequent chemical stripping with Au(III). Factors affecting sensitivity and precision including acidity, Au(III) concentration, electrodeposition potential and flow rate were optimized. Optimum determination of As(III) in solutions containing 160 mg L À1 and 1.2 M hydrochloric acid was accomplished with an electrolysis potential of À 0.1 V (vs. Ag/AgCl) and a flow rate of 0.59 mL min À1. Different linear concentration ranges were achieved under these conditions with good precision and relative standard deviations between 6 -9%. The detection limit obtained after 120 s of electrolysis was 0.55 mg L À1.

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mentioning

confidence: 95%

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

Muñoz¹,

Palmero²

2004

Electroanalysis

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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%

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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“…Copper is a common element which is often present in water samples. Adeloju [39] determined As (III) by cathodic stripping potentiometry (CSP) on a glassy carbon mercury film electrode in the presence of copper (II) ions. By using a mercury film electrode with the application of a constant cathodic stripping current, copper interference problems can be overcome, unlike methods for arsenic which utilize gold film electrodes.…”

Section: Depositionmentioning

confidence: 99%

Analytical Tools for Monitoring Arsenic in the Environment

Luong¹,

Majid²,

Male³

2007

TOACJ

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Inorganic arsenic possesses the highest toxicity threat amongst all its forms found in natural groundwater and its mobility in aquatic systems and in the soil is of great environmental concern. Besides their toxicity to humans, arsenate and arsenite are highly toxic to plants. Arsenic can only be transformed into a less-toxic material and becomes a permanent part of the environment. Thus, there is a continuing need for its monitoring at arsenic-containing sites where it occurs naturally at elevated levels. This report reviews technologies with the potential to measure and monitor arsenic in the environment. However, we focus on the modern electrochemical methods of arsenic detection in drinking water. The pros and cons of such techniques are discussed with respect to their sensitivity, ability to detect the chemical states of arsenic, reliability, potential interferences, and ease of operation. In particular, emphasis has been devoted to more recent topics including modern stripping voltammetry, electrode modification, nanomaterials, and biosensors. The necessity for field instrumentation, detection and monitoring has also been addressed.

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Constant current cathodic stripping potentiometric determination of arsenic on a mercury film electrode in the presence of copper ions

Cited by 48 publications

References 18 publications

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

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

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

Analytical Tools for Monitoring Arsenic in the Environment

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