Liquid-liquid extraction of zirconium with tri-n-butyl-acetohydroxamic acid and spectrophotometric determination in the organic phase with xylenol orange |
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Authors: | Donatella Desideri Lamberto Staccioli Corrado Testa |
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Institution: | Institute of General and Inorganic Chemistry, Faculty of Pharmacy, University of Urbino Italy |
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Abstract: | Zirconium (6–121 μg) is determined with xylenol orange after liquid-liquid extraction by tri-n-butylacetohydroxamic acid (TBAH) from 6 M hydrochloric acid. Under optimal conditions (primarily, 1 1:1.5 ratio of TBAH to xylenol orange, addition of acetic acid, and measurement at 545 nm), the calibration is linear with a molar absorptivity of 34 650 l mol?1 cm?1. Ions which are not extracted by TBAH or donot form coloured complexes do not interfere; these include uranium and rare-earth elements. Hafnium interferes; interference from thorium is avoided by a preliminary extraction of zirconium with tri-n-octylamine. |
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