Radiochemical separation of strontium by amalgam exchange

Qureshi, I. H.; Meinke, W. Wayne

doi:10.1016/0039-9140(63)80102-2

Cited by 18 publications

(8 citation statements)

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“…It gives high yields of thallium with good decontamination from most typical elements. In terms of time and degree of separation this procedure appears to be somewhat better than the amalgam exchange procedures developed for cadmium[l], indium [2], and strontium [3]. The yield is relatively insensitive to interferences.…”

Section: Resultsmentioning

confidence: 98%

“…A fast chemical method has been worked out for the separation of antimony from irradiated enriched tellurium, making it possible also to recover the target tellurium for successive irradiations. The methods mentioned in the literature [1] as a rule take too much time to be used in these cases [2], or require procedures which depend strongly on the experimental conditions [3]. In this work a method for separating antimony is presented, in which the total separation time is about 15 minutes.…”

Section: Resultsmentioning

confidence: 99%

“…The principle of isotopie exchange between a dilute amalgam and its ions in solution has been successfully applied for rapid radiochemical separations of cadmium [1], indium [2], strontium [3], and bismuth [4]. Our studies on these elements show that the contamination due to several elements can be reduced in most cases to less than 0.1% or better ina simple few-minute procedure.…”

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confidence: 95%

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Radiochemical Separation of Thallium by Amalgam Exchange

Qureshi¹,

Meinke²

1963

Radiochimica Acta

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Thallium by Amalgam Exchange 99 etc., make direct in-core irradiations impossible or undesirable. The short-lived y-emitters might also be used in some kinds of loop systems. While high y-ray intensity inherently connected with photoneutron sources is a distinctive disadvantage in many applications, with suitable techniques and simple shielding, sources of the order of 1 to 2 curies can be handled safely with relative ease. Remote handling systems and facilities would of course permit handling of much higher intensities.In another area of activation analysis the data of Table 1 can be used to amplify and expand to other elements the ingenious method of analysis for sodium proposed by AMIEL and PEISACH [15] in which they count the photoneutrons formed by interaction of the heigh energy sodium gamma rays with deuterium.15. S. AMIEL and M. PEISACH, Israel Atomic Energy Commission Report IA-799 (February 1963). SummaryThe radiochemical separation of thallium by an amalgam exchange technique has been critically evaluated for the aqueous 0.5 M sodium nitrate system. With an optimized procedure, thallium yields of more than 95% were obtained while yields of contaminants, in most cases, were less than 0.1%. The yield is relatively insensitive to interferences from mineral acids, alkalies and salts, except for halogen acids, sulphites and oxidizing agents. At room temperature the procedure requires about 6 minutes while at 50° C it can be carried out in only 4 minutes. The application of this method to the separation of radio-thallium in the presence of fission products requires about 8 minutes. This procedure appears to have useful potential for the separation of short-lived isotopes of thallium and can readily be modified for the determination of small amounts of thallium in various samples when used in conjunction with neutron activation analysis. Zusammenfassung Die radiochemische Trennung von Thallium durch ein Amalgam-Austauschverfahren wurde für das wässerige System mit 0,5 m NaN0 3 kritisch untersucht. Mit einem optimierten Verfahren wurden Thalliumausbeuten von über 95% erzielt, während die aktiven Verunreinigungen meist unter 0,1% lagen. Mineralsäuren, Alkalien und Salze stören wenig, mit Ausnahme von Halogenwasserstofisäuren, Sulfiten und Oxydationsmitteln. Bei Zimmertemperatur benötigt das Verfahren etwa 6, bei 50 °C nur 4 Minuten. Die Anwendung des Verfahrens auf die Abtrennung von Radiothallium in Gegenwart von Spaltprodukten braucht etwa 8 Minuten. Die Methode erscheint nützlich für die Trennung kurzlebiger Thalliumisotope und kann ohne weiteres für die Bestimmung kleiner Thalliummengen in verschiedenen Proben abgeändert werden, kombiniert mit der Neutronenaktivierungsanalyse. RésuméLa séparation radiochimique du thallium par échange avec de l'amalgame a été critiquement examinée dans le système aqueux à 0,5 m de NaN0 3 . Avec un procédé optimé on obtient des rendements plus de 95% tandis que la contamination, dans la plupart des cas, était moins de 0,1%. Le rendement est presque insensible aux acides miné...

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 95%

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Radiochemical Separation of Thallium by Amalgam Exchange

Qureshi¹,

Meinke²

1963

Radiochimica Acta

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“…Among these techniques, the spontaneous electrodeposition reaction, in which a metallic ion is either deposited spontaneously on a more electronegative element or on the same dement by isotopic exchange, is widely used for rapid radiochemical Separation [2][3][4][5][6][7][8][9][10][11][12]19]. …”

Section: Rapid Separation Of Radionuclides By Spontaneous Electrodepomentioning

confidence: 99%