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Microdetermination of selenium, tellurium, and arsenic in organic compounds

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Summary

A method is described for determination of selenium, tellurium and arsenic in organic compounds. Decomposition is carried out either by oxygen-flask combustion or by wet digestion with sulphuric and nitric acids. The analysis is completed by argentometric titration, at pH 8–8.5, of the selenite, tellurite or arsenate formed. Halogens can often be determined simultaneously, and procedures are given for dealing with metal-containing compounds. Results obtained are within the usual limits for microanalysis (±0.3%).

Zusammenfassung

Eine Methode zur Bestimmung von Selen, Tellur und Arsen in organischen Verbindungen wurde beschrieben. Deren Zerstörung erfolgt entweder im Sauerstoffkolben oder durch nasse Veraschung mit Salpetersäure-Schwefelsäure. Die Endbestimmung erfolgt argentometrisch bei pH 8–8,5. Oftmals kann gleichzeitig auch Halogen bestimmt werden. Arbeitsvorschriften für Organometallverbindungen wurden angegeben. Die Ergebnisse liegen innerhalb der üblichen Fehlergrenzen von ±0,3%.

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Masson, M.R. Microdetermination of selenium, tellurium, and arsenic in organic compounds. Mikrochim Acta 65, 399–411 (1976). https://doi.org/10.1007/BF01218272

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  • DOI: https://doi.org/10.1007/BF01218272

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