International Journal of Science and Technology

International Journal of Science and Technology>> Volume 7, Number 6, June 2017

International Journal of Science and Technology

Spectrophotometric determination of Trace Amounts of Uranium with 5,10,15,20 – Tetra (4- Sulfophenyl) Porphyrin (TPPS4)

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Author Jehad Abed Taies
On Pages 871-875
Volume No. 2
Issue No. 12
Issue Date December, 2012
Publishing Date December, 2012
Keywords Porphyrin, uranium spectrophotometry.


In this paper, the complex reaction of water – soluble tetra (4-sulfophenyl) porphine with uranium ion was studied spectrophotometrically and kinetics as well as photodecomposition of complex was determined. The porphyrin was found to be a highly sensitive and highly selective reagent for direct spectrophotometric determination of uranium ion at 2x10-9M (0.47ngl-1) level. The soret band of the complex lies at 420 nm in the presence of hydroxyl amine, the reaction can be formed within 2 minutes in a boiling water bath at pH 3.0. Beer's law is obeyed for uranium in the rang of 0.01 - 120 µgl-1. The molar ratio of complex is 1:2(U: TPPS4) and the apparent molar absorptivity of the method is (€ = 2.2x105) L.M-1. CM-1. This method has been applied to determine uranium in a tap water samples and can be used for rare earth samples with satisfactory results.

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