Liquid—liquid extraction and determination of uranium(IV) with 2,6-diacetylpyridine bis(benzoylhydrazone)

2,6-Diacetylpyridine bis(benzoylhydrazone) (H 2DPBH) is proposed as a ligand for the extraction of uranium(VI). Complete extraction from aqueous solutions into dichloromethane is achieved with a ligand/metal mole ratio of < for 10 −5−10 −4 M uranyl ion. Potentiometric measurements indicate that t...

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Bibliographic Details
Published in:Analytica chimica acta 1986, Vol.186, p.283-287
Main Authors: Casoli, Antonella, Mangia, Alessandro, Mori, Giovanni, Predieri, Giovanni
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Exact sciences and technology
Spectrometric and optical methods
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Summary:2,6-Diacetylpyridine bis(benzoylhydrazone) (H 2DPBH) is proposed as a ligand for the extraction of uranium(VI). Complete extraction from aqueous solutions into dichloromethane is achieved with a ligand/metal mole ratio of < for 10 −5−10 −4 M uranyl ion. Potentiometric measurements indicate that the extracted species is UO 2 (DPBH). Uranium can be determined in the extract by spectrophotometric measurements at 420 nm and by differentail pulse polarography ( E p = −0.67 V) with tetraethylammonium bromide as supporting electrolyte. For both methods, the detection limit is about 2 × 10 −6 M in the extract.
ISSN:0003-2670
1873-4324
DOI:10.1016/S0003-2670(00)81798-5