Die Bestimmung von Selenspuren

Böck, Rudolf; Jacob, D.; Fariwar, Mohamed; Frankenfeld, Klaus

doi:10.1007/bf00474394

Cited by 27 publications

(7 citation statements)

References 125 publications

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“…However, it must be strongly stressed that taking the solutions to complete dryness has to be avoided, since we found losses of Se in preliminary experiments without granite. This is in accord with the findings by Bock and Jacob (9) and is probably due to volatilization of oxides of selenium. It might be added that the use of Teflon beakers is an advantage here since the formation of dry spots of residue next to a small volume of liquid is greatly reduced if compared to platinum vessels.…”

Section: Resultssupporting

confidence: 93%

Volatilization of arsenic(III, V), antimony(III, V), and selenium(IV, VI) from mixtures of hydrogen fluoride and perchloric acid solution: application to silicate analysis

Bajo¹

1978

Anal. Chem.

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The possible volatilization of As(III, V), Sb(III, V), and Se(IV, VI) from mixtures of HCI04/HF is investigated. It is shown that there are no losses with Sb and Se irrespective of the initial oxidation state, and with As(V). As(III) is partially or totally lost by volatilization; this can be avoided by oxidizing As with HCI04. The oxidation state of all three elements after the HCI04/HF treatment is determined. These results lead to a recommended procedure for the dissolution of siliceous materials in which As, Sb, or Se are to be determined.Silicates are often dissolved for analytical purposes by a mixture of HF and HC104 (1, 2). However, it is not clear from the literature (3, 4) if in the course of this operation, which comprises partial or total evaporation of the solution, there are losses of traces of As, Sb, and Se. The usefulness of some existing literature data is restricted, because (a) the oxidation state and the weight of the elements used in an experiment are not stated ( 5), (b) the possibility of absorption by platinum vessels-which was demonstrated for Se (6)-is often not taken into account (5, 7,8), (c) it is often not possible to decide if the observed losses are really due to volatilization and not to some other step in the procedure used.The volatilization of Se from different solutions was studied by Bock and Jacob (9), but the system HF/HC104 has received

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Section: Resultssupporting

confidence: 93%

Volatilization of arsenic(III, V), antimony(III, V), and selenium(IV, VI) from mixtures of hydrogen fluoride and perchloric acid solution: application to silicate analysis

Bajo¹

1978

Anal. Chem.

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“…In attempting to avoid volatilization losses, several methods have effected dissolution of the sample through combustion with oxygen in closed systems (7, 3, 6, 7). Small losses were reported from added selenite (3,6), but not from selenium present in the sample (7,7).…”

mentioning

confidence: 99%

Fluorometric Determination of Selenium in Biological Material with 2,3-Diaminonaphthalene.

Jh¹

1966

Anal. Chem.

631

153

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“…Als BOCK [23] iiber eine neue Mikromethode fur Selen berichtete, hatte ich den Mut, das seit 12 Jahren anstehende Problem anzugehen. FINK selbst hatte keine eigene Selenbestimmung durchgefuhrt, sondern in geringem Umfang von SCHWARZ vornehmen lassen.…”

Section: I I Biochemische Bedeutung Des Selens In Milchunclassified

Biochemie der Spurenelemente in Milch am Beispiel des Selens

Kiermeier

1968

Nahrung

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Die Bestimmung von Selenspuren

Cited by 27 publications

References 125 publications

Volatilization of arsenic(III, V), antimony(III, V), and selenium(IV, VI) from mixtures of hydrogen fluoride and perchloric acid solution: application to silicate analysis

Volatilization of arsenic(III, V), antimony(III, V), and selenium(IV, VI) from mixtures of hydrogen fluoride and perchloric acid solution: application to silicate analysis

Fluorometric Determination of Selenium in Biological Material with 2,3-Diaminonaphthalene.

Biochemie der Spurenelemente in Milch am Beispiel des Selens

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