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Selective Substoichiometric separation of fluoride by solvent extraction into chloroform with triphenyl-tin chloride

Selektive substöchiometrische Abtrennung von Fluorid durch Extraktion mit Triphenylzinnchlorid in Chloroform

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Summary

A unique method has been developed for the selective separation of fluoride from a 50% dimethylsulfoxide (DMSO) aqueous phase via Substoichiometric replacement reaction with triphenyl-tin chloride and extraction into chloroform. Precise (±2.5%) Substoichiometric separations of fluoride in the presence of bromide, chloride, iodide, nitrate, thiocyanate, or sulfate have been accomplished. Applicability of the method for radionuclide separations in activation analysis is demonstrated via the examples of irradiated ammonium fluoride, hydrofluoric acid, and18F isotope labeled sodium and magnesium fluorides. Results for quantitative radioisotope dilution determinations show an error of ±2.1% for a fluoride level of 0.761±0.044 mg.

Zusammenfassung

Die selektive Abtrennung von Fluorid aus 50% igem Dimethylsulfoxid in Wasser durch substöchiometrische Verdrängungsreaktion mit Triphenylzinnchlorid und Extraktion in Chloroform wurde ausgearbeitet. Auf ±2,5% genaue substöchiometrische Trennungen von Fluorid in Gegenwart von Bromid, Chlorid, Jodid, Nitrat, Rhodanid oder Sulfat wurden durchgeführt. Die Anwendbarkeit des Verfahrens für die radiochemische Abtrennung bei der Aktivierungsanalyse wurde an Beispielen von bestrahltem Ammoniumfluorid, Fluorwasserstoffsäure und mit18F markiertem Natrium-bzw. Magnesiumfluorid gezeigt. Die Ergebnisse der quantitativen Bestimmung der Radioisotop-Verdünnung zeigen einen Fehler von ±2,1% für Fluoridmengen von 0,76±0,044 mg.

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References

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Authors and Affiliations

  1. The Analytical Chemistry Department, AT & T Bell Laboratories, Murray Hill, New Jersey, USA

    J. W. Mitchell

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  1. J. W. Mitchell
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Mitchell, J.W. Selective Substoichiometric separation of fluoride by solvent extraction into chloroform with triphenyl-tin chloride. Mikrochim Acta 83, 243–250 (1984). https://doi.org/10.1007/BF01207072

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  • DOI: https://doi.org/10.1007/BF01207072

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