Übersicht über die Bedeutung von Selen in der Umwelt und kritische Bewertung seiner Bestimmungsmöglichkeiten im Spurenbereich

Raptis, S.; Kaiser, G.; Tölg, G.

doi:10.1007/bf00488176

Cited by 117 publications

(29 citation statements)

References 324 publications

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“…These methods have been reviewed by several authors during the past two to three decades (e.g., Nazarenko and Ermakov 1972, Bem 1981, Raptis et al 1983, Ihnat 1992, Thomassen et al 1994, Alaejos and Romero 1995. In publications dealing with selenium in general methods for selenium and selenium compounds were also mentioned (e.g., Cooper 1974, Glover et al 1979, Robberecht and van Grieken 1980, Einbrodt and Michels 1984, WHO 1987, Fishbein 1991.…”

Section: Methodsmentioning

confidence: 99%

“…For determination of the total amount of selenium in biological samples, ICP-MS has the advantage over other methods of analysis in that it does not require the complete destruction of the organic matrix prior to analysis; microwave digestion with nitric acid-hydrogen peroxide is usually adequate. However, irrespective of the method of analysis used, extra precautions are always necessary during sample collection, storage and sample preparation to prevent losses from volatilization or contamination (Glover et al 1979, Raptis et al 1983, Fishbein 1991, Ihnat 1992, Forrer et al 2001). …”

Section: Methodsmentioning

confidence: 99%

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Selenium

Schrauzer

2004

Elements and Their Compounds in the Environment

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Selenium

Schrauzer

2004

Elements and Their Compounds in the Environment

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“…Selenium in trace and ultra-trace amounts is an important element in biological and environmental systems [1,2]. At elevated levels, however, it is toxic for humans as well as for other organisms.…”

Section: Introductionmentioning

confidence: 99%

Determination of Selenium with a Poly(1,8‐diamino‐naphthalene)‐Modified Electrode

2005

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The performance of a poly(1,8-diaminonaphthalene)-modified electrode for the determination of the Se(IV) ion in an aqueous medium was investigated with anodic stripping voltammetry without the pretreating of the sample. The experimental parameters for the analysis of Se(IV) were optimized and the characteristics of this polymer-modified electrode were investigated by using cyclic voltammetry. The Se(IV) ions were chemically deposited onto the surface of the pDAN-Au electrode in an acidic medium. The detection limit employing the anodic stripping differential pulse voltammetry was 9.0 Â 10 À9 M for Se(IV) with 4.4 % of RSD. Satisfactory result for the determination of Se(IV) was acquired employing a certified standard urine reference material, SRMs 2670 (trace element in urine) with 4.1 ppb of SD.

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“…Selenium is an important element in biological and environmental systems [1,2]. Selenium can exist in several oxidation states (À II, 0, þ IV, þ VI).…”

Section: Introductionmentioning

confidence: 99%

Determination of Selenium Traces on Cyclic Renewable Mercury Film Silver Electrode in Presence of Copper Ions Using Cathodic Stripping Voltammetry

Piech

2008

Electroanalysis

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The new cyclic renewable mercury film silver based electrode (Hg(Ag)FE), applied for the determination of selenium(IV) traces in the presence of copper ions using differential pulse cathodic stripping voltammetry (DP CSV) is presented. The preparation of the Hg(Ag)FE is very simple. The effects of various factors such as: preconcentration potential and time, pulse height, step potential and supporting electrolyte composition are optimized. The calibration graph is linear from 0.5 nM (39 ng L À1) to 100 nM (7.9 mg L À1) for a preconcentration time of 45 s, with correlation coefficient of 0.9995. For a Hg(Ag)FE with a surface area of 8 mm 2 the detection limit for a preconcentration time of 90 s is as low as 17 ng L À1 . The repeatability of the method at a concentration level of the analyte as low as 2 mg L À1 , expressed as RSD is 2.7% (n ¼ 7). The proposed method was successfully applied and validated by studying the certified reference material (bovine liver BCR-185) and simultaneously recovery of Se(IV) from spiked water samples.

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Übersicht über die Bedeutung von Selen in der Umwelt und kritische Bewertung seiner Bestimmungsmöglichkeiten im Spurenbereich

Cited by 117 publications

References 324 publications

Selenium

Selenium

Determination of Selenium with a Poly(1,8‐diamino‐naphthalene)‐Modified Electrode

Determination of Selenium Traces on Cyclic Renewable Mercury Film Silver Electrode in Presence of Copper Ions Using Cathodic Stripping Voltammetry

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