Analytical Science and Technology (분석과학)

The Korean Society of Analytical Sciences (한국분석과학회)
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Determination of Uranyl Nitrate with Several Ligands by Spectrophotometry

  • Showkat, Ali Md. (Department of Chemistry Graduate School, Kyungpook National University) ;
  • Zhang, Yu-Ping (Department of Chemistry Graduate School, Kyungpook National University) ;
  • Kim, Min Seok (Department of Chemistry Graduate School, Kyungpook National University) ;
  • Kim, Sang-Ho (Department of Chemistry Graduate School, Kyungpook National University) ;
  • Choi, Seong-Ho (Department of Chemistry, Hannam University) ;
  • Lee, Kwang-Pill (Department of Chemistry Graduate School, Kyungpook National University)
  • Received : 2003.10.18
  • Accepted : 2004.01.07
  • Published : 2004.02.25
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Abstract

Trace amount of uranyl (II) has been determined spectrophotometrically by measuring the optical density of the light blue yellowish coloured solutions formed by reaction between the metal ion and nicotinohydroxamic acid (NHx) in presence of different secondary ligands in strong isoamyl alcohol alkaline medium. The absorption maxima for both aqueous and extracted systems measured at their respective optimum pH were found to be 360 and 559 nm (DETA), 375 and 358 nm (EDA), 369 and 362 nm (piperidine), 354 and 341 nm (pyridine) and 363 and 336 nm (3 piperidine), 354 and 341 nm (pyridine) and 363 and 336 nm (3 - picoline), respectively at which Beer's law was obeyed. Effect of pH, reagent concentration, order of addition of reagent, time, temperature and solvent media on the absorption spectra have also been studied. Among the different systems studied, the shortest concentration range of uranyl(II) adhering to Beer's Law was 2.4 - 10.5 ppm observed for $UO_2(II)$ - NHx - DETA system in aqueous medium and also for iso amyl alcohol(IAA) extracted $UO_2$ - NHx - pyridine system was 2.4 - 7.8.

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References

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