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International Letters of Chemistry, Physics and Astronomy
Volume 12

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Selective Separation of Cerium from Lanthanides by Extractive Photometry Using HDBE as Novel Reagent

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Abstract:

Striking similarities in properties of lanthanides make their separation a difficult task. Development of highly selective analytical reagent hexane-2,5-dione-bis(ethylenediamine) HDBE that forms brown coloured complex with Ce(IV) which is quantitatively extracted into xylene at pH 6.4. Transfer of extracted complex to organic phase is very fast (<1min.). Optimum concentration of reagent required for complexation and full colour development is very low (0.8 cm3 of 0.1 % HDBE). Absorption maximum exhibited at 518 nm. Beer’s law is obeyed in the detectable range 0.3-4.0 ppm. The molar absorptivity and Sandell’s sensitivity values are 0.421·104 dm3· mol-1·cm-1 and 0.017 µg·cm-2 respectively. The present method is time honoured, permits selective separation of cerium from associated lanthanones using HDBE as a novel complexing agent.

Info:

Periodical:
International Letters of Chemistry, Physics and Astronomy (Volume 12)
Pages:
144-150
Citation:
Y. Bambardekar et al., "Selective Separation of Cerium from Lanthanides by Extractive Photometry Using HDBE as Novel Reagent", International Letters of Chemistry, Physics and Astronomy, Vol. 12, pp. 144-150, 2013
Online since:
April 2013
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