A rapid method of sample preparation for determining arsenic in water by stripping voltammetry

Investigations into the Speciation of Inorganic Arsenic in Weakly Alkaline Medium by Voltammetry

“…It was found that under the voltammetric protocol conditions common anions such as sulfates, carbonates and chlorides at concentrations ranging between 1–10 mM do not interfere with the ASV determination of As(V) using photolysis. However, it has previously been shown that nitrate anions do interfere by inhibiting the photochemical reduction of As(V) 33. Indeed, our own experiments have shown that As(V) peak decreases and disappears when nitrate is added to an electrolyte containing only sulfite (Figure 6).…”

“…Khustenko et al. 33 demonstrated that the photoactivation of sulfite solution under ambient conditions leads to the photoreduction of As(V) to As(III), and hence the total arsenic content may then be analyzed in the As(III) form in the same background electrolyte solution. The procedure utilizes a voltammetric analyzer equipped with a built‐in photoreactor 34, and is attractive due to its rapidity and simplicity.…”

Inorganic arsenic speciation by electroanalysis. From laboratory to field conditions: A mini-review

“…The following reducing agents for As(V) are used: sulphite (Na 2 SO 3 , SO 2 (g)), thiosulfate, sulfite mixture, hydrazine + HBr, KI (sometimes with the addition of ascorbic acid), L-Cystein [41], among others [9,19]. Oxidation with ozone (pH 9, Na 2 SO 3 ) and subsequent photoreduction of As(V) to As(III) at room temperature without the addition of any reactants is one of the fastest and most effective methods of total As determination [127]. In the second approach, after the oxidation of all the arsenic species to As(V) its concentration is determined as С tot , and the original C As(V) is calculated as the difference C As(V) = C tot -C As(III) .…”

Fabrication and application of gold microelectrode ensemble based on carbon black–polyethylene composite electrode

“…At present, there are not so many articles on fabrication and voltammetric application of carbon black-polyethylene composite modified with gold electrodeposition. Papers we found are concerned with Hg 27 and As 28,29 determination. The mentioned papers describe the carbon soot-based electrode support with considerably bigger conductive particles.…”