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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

Determination of Uranium using 1-(2-Pyridylazo)-2-naphthol by Adsorptive Stripping Voltammetry

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1995, v.8 no.3, pp.285-292
Kim, Kyoung Tae
Choi, Won Hyung
Lee, Jin Sik
Choi, Sung Yung
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Abstract

Uranium has variable oxidation states(<TEX>${UO_2}^{+2}$</TEX>, <TEX>$UO^{+2}$</TEX>, <TEX>$U^{+4}$</TEX>, <TEX>$U^{+3}$</TEX>) and 1-(2-Pyridylazo)-2-naphthol forms a very stable chelate with Uranium(<TEX>${UO_2}^{+2}$</TEX>). The determination method of Uranium(<TEX>${UO_2}^{+2}$</TEX>) in 0.1M Borate buffer(pH 7.10) has been investigated by adsorptive stripping voltammetry. The optimum conditions were PAN concentration of <TEX>$5{\times}10^{-7}M$</TEX>, accumulation potential of 0.00V(vs. Ag/AgCl) and accumulation time of 120sec. The calibration curve was linear over the range of <TEX>$5{\sim}60{\mu}g/L$</TEX> and the various metal ions did not interfere with the determination Uranium(<TEX>${UO_2}^{+2}$</TEX>) except Cu(II) and Co(II).

keywords
Uraruum(<TEX>${UO_2}^{+2}$</TEX>), 1-(2-Pyridylazo)-2-naphthol, Adsorptive Stripping Voltammetry


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