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• W2030149314 abstract "A new procedure for the substoichiometric extraction of bivalent manganese by thenoyltrifluoroacetone into ethyl acetate has been developed and used in activation analysis. The value of the extraction constant has been found to be 3.1 × 10−6; the pH range in which the extraction can be performed is 7.8–9.2. The influence of oxalate, citrate, tartrate, fluoride and cyanide ions has been studied. A selective substoichiometric extraction of manganese in the presence of Zr, Hf, Nb, Th, Fe and Sc is possible at pH 8–8.5, tartrate and fluoride being used as masking agents. Copper and cobalt can be screened by ammonia and cyanide respectively. The method has been used for the determination of manganese in biological materials, potassium fluoride and zirconium. On a élaboré et utilisé dans l'analyse par activation une nouvelle méthode pour l'extraction substoechiométrique du manganèse bivalent par la thénoyltrifluoracétone en acétate d'éthyle. On a trouvé que la valeur de la constante d'extraction est de 3,1 × 10−6; on peut effectuer l'extraction aux pH compris entre 7,8 et 9,2. On a étudié l'influence des ions oxalate, citrate, tartrate, fluorure et cyanure. Une extraction substoechiométrique sélective du manganèse en présence de Zr, Hf, Nb, Th, Fe et Sc est possible à pH 8–8,5, le tartrate et le fluorure étant utilisés comme agents de dissimulation. Le cuivre et le cobalt peuvent être masqués par l'ammoniaque et le cyanure respectivement. On a utilisé la méthode pour le dosage du manganèse dans les matériaux biologiques, le fluorure de potassium et le zirconium. Eine neue Vorschrift zur substöchiometrischen Extraktion von zweiwertigem Mangan durch Thenoyltrifluoraceton in Essigester wurde entwickelt und bei der Aktivierungsanalyse verwendet. Die Extraktionskonstante wurde zu 3,1.10−6 ermittelt. Die Extraktion kann im pH-Bereich 7,8–9,2 vorgenommen werden. Der Einfluß von Oxálat, Citrat, Tartrat, Fluorid und Cyanid wurde untersucht. Mit Tartrat und Fluorid als Maskierungsmitteln läßt sich Mangan selektiv substöchiometrisch in Gegenwart von Zr, Hf, Nb, Th, Fe und Sc bei pH 8–8,5 extrahieren. Kupfer und Kobalt können durch Ammoniak bzw. Cyanid maskiert werden. Die Methode wurde zur Bestimmung von Mangan in biologischen Materialien, Kaliumfluorid und Zirkonium verwendet." @default.
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• W2030149314 date "1967-02-01" @default.
• W2030149314 modified "2023-10-16" @default.
• W2030149314 title "Use of thenoyltrifluoroacetone for the determination of manganese by activation analysis" @default.
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• W2030149314 doi "https://doi.org/10.1016/0039-9140(67)80182-6" @default.
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