2001
DOI: 10.1002/1521-4109(200106)13:10<872::aid-elan872>3.0.co;2-f
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Determination of Total and Mobile Arsenic Content in Soils

Abstract: The determination of total and mobile arsenic contents in soils using cathodic stripping voltammetry on hanging mercury drop electrode and atomic absorption spectrometry with electrothermal atomization is presented. For total arsenic determination microwave digestion with different acid mixtures was investigated and recovery of arsenic was discussed. To assess metals availability from soils the single extraction procedure by 0.43 mol L−1 CH3COOH proposed by BCR was applied. Obtained results were validated by a… Show more

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Cited by 15 publications
(9 citation statements)
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“…The voltammetric determination of As could be carried out in the extract solution without UV irradiation, so the discrimination between inorganic and organic arsenic compounds is possible. The efficiency of the extraction above 60% for soil 1 and 25% for soil B was achieved, which are considerably higher than arsenic bioavailability from the investigated soils (25% and 15% respectively [13]). Bioavailable arsenic contents in the soils were determined after the extraction with 0.43 mol L À1 CH 3 COOH according to the BCR procedure [19 ± 20].…”
Section: Resultsmentioning
confidence: 71%
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“…The voltammetric determination of As could be carried out in the extract solution without UV irradiation, so the discrimination between inorganic and organic arsenic compounds is possible. The efficiency of the extraction above 60% for soil 1 and 25% for soil B was achieved, which are considerably higher than arsenic bioavailability from the investigated soils (25% and 15% respectively [13]). Bioavailable arsenic contents in the soils were determined after the extraction with 0.43 mol L À1 CH 3 COOH according to the BCR procedure [19 ± 20].…”
Section: Resultsmentioning
confidence: 71%
“…Results are expressed as a mean AE RSD for n 6, a 0.5. [13]. For arsenic extraction from soils besides methanol/water and phosphoric acid also mixture of HCl/HNO 3 was applied although in this case differentiation between inorganic arsenic species is not possible owing to the oxidation of inorganic As(III) to As(V).…”
Section: Resultsmentioning
confidence: 99%
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“…Quando a mistura KI/ ácido ascórbico é empregada como meio redutor, a redução de As(V) ocorre à temperatura ambiente, em tempos de reação que dependem das concentrações dos componentes na mistura. Alguns trabalhos publicados recentemente relatam a otimização deste meio redutor em determinações voltamétricas de As(V) 14,[41][42][43] , com tempos de reação de aproximadamente 10 min para que a reação se complete. Já quando Na 2 S 2 O 3 é empregado para a redução, a reação se processa rapidamente à temperatura ambiente e sem interferências do meio redutor durante a CSV para As(III) 53 .…”
Section: Etapa De Redução As(v) → As(iii)unclassified