Investigations into the Speciationof Inorganic Arsenicin Weakly Alkaline Medium by Voltammetry / E. A. Zakharova, G. N. Noskova, M. L. Moskaleva [et al.]
Уровень набора: ElectroanalysisЯзык: английский.Резюме или реферат: The speciation of inorganic forms of arsenic was studied using anodic stripping voltammetry (ASV) at a gold microelectrode in conjunction with photoreduction of As(V). Sodium sulfite (0.1 M) and ammonium buffer (pH≥9.5) were selected as both background electrolyte and photo-reductive reagent. Oxygen was removed by radical chain reactions with sulfite. The proposed speciation method was validated for mixtures of arsenic As(III/V) at concentrations up to 1 mg L−1. The calculated LOD of As(III/V) was 0.06 µg L−1 (3σ, tdep 40 s). Any interference from nitrate anions present at up to millimolar concentration was minimized by their photoreduction..Примечания о наличии в документе библиографии/указателя: [References: 42 tit.].Аудитория: .Тематика: электронный ресурс | труды учёных ТПУ | мышьяк | вольтамперометрия | фотовосстановление | неорганические формы Ресурсы он-лайн:Щелкните здесь для доступа в онлайнTitle screen
[References: 42 tit.]
The speciation of inorganic forms of arsenic was studied using anodic stripping voltammetry (ASV) at a gold microelectrode in conjunction with photoreduction of As(V). Sodium sulfite (0.1 M) and ammonium buffer (pH≥9.5) were selected as both background electrolyte and photo-reductive reagent. Oxygen was removed by radical chain reactions with sulfite. The proposed speciation method was validated for mixtures of arsenic As(III/V) at concentrations up to 1 mg L−1. The calculated LOD of As(III/V) was 0.06 µg L−1 (3σ, tdep 40 s). Any interference from nitrate anions present at up to millimolar concentration was minimized by their photoreduction.
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