Determination of selenium in seawater by Zeeman GFAAS using nickel plus NH 4 NO 3 modifier

Liang, Yanzhong; Mei, Li; Rao, Zhu

doi:10.1007/s002160050122

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Cited by 12 publications

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“…The most commonly used are the spectroscopic techniques such as¯uori-metry [5], HG-AAS [6], ET-AAS [7] or electrochemical techniques [8±9]. The cathodic stripping procedures are based on the preconcentration and subsequent reduction of HgSe [10], Cu 2 Se [8±9] and Rh 2 Se 3 [11].…”

Section: Introductionmentioning

confidence: 99%

Speciation Analysis of Selenium in Seawater by Cathodic Stripping Voltammetry

Quentel

Elléouet

1999

Electroanalysis

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A procedure for the determination of selenium species in seawater is proposed. The speciation scheme is based on different sample treatments followed by the quanti®cation of Se(IV) by differential pulse cathodic stripping voltammetry. To remove the organic matter present in seawater which interferes in the electrochemical step a XAD-2 resin is used. So the selenite concentration can be directly determined. After passage through an IRA 400, selenide is collected in the percolated solution. Following conversion into the tetravalent state, selenium is determined. UV photolysis at basic pH is used to convert all the selenium species to Se(IV) which is the electroactive species. The procedure is applied to seawater samples.

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