Simultaneous determination of uranium and thorium by second-derivative spectrophotometry

Abstract

A second-derivative spectrophotometric method has been developed for the simultaneous determination of uranium and thorium using 4-(2'-thiazolylazo)resacetophenone oxime as the spectrophotometric reagent. The method allows the determination of uranium and thorium in the range 0-10.0 ppm. The relative error is less than 4%. Common anions and cations do not interfere in the determination even when present in large amounts. However, for transition metal ions, viz., Cu, Ni, Pd and Pt, the tolerance limit is less than 100 ppm.

Differential Pulse Polarographic Determination of Rhodium(III) and Ruthenium(III) in Synthetic Samples after Preconcentration of Their Quinolin-8-olate Complexes onto Microcrystalline Naphthalene

“…NAA, AAS, graphite furnace AAS, ICP-AES, and ICP-MS may be used for the determination of metals but these instruments are highly expensive, day-to-day maintenance is high, and the methods are not free from various types of inherent interferences (5)(6)(7). Among the various preconcentration techniques, solvent extraction is very popular owing to its simplicity and applicability to both trace and macro amounts of metal ions.…”

Surfactant Enhanced-Spectrophotometric Determination of Uranium (VI) at Trace Levels by Using Eriochrome Black T as a Chelating Agent

“…These methods lack sensitivity and selectivity. Although atomic absorption spectroscopy [8,9], neutron activation analysis [10], X-ray fluorescence [11], ICP-AES and ICP-MS [12,13] may be applied for the determination of uranium in complex samples, these instruments are expensive, day to day maintenance is high and they are not free from various types of inherent interference [8][9][10][11][12][13]. Especially, atomic spectrometry methods have found little application for the determination of uranium mainly due to its high spectral background and the low sensitivity attainable due to the high thermal stability of uranium oxides [14,15].…”

Differential Pulse Polarographic Determination of Uranium(VI) in Complex Materials after Adsorption of Its Trifluoroethylxanthate Cetyltrimethylammonium Ion-Associated Complex on Naphthalene Adsorbent

“…Although atomic absorption spectroscopy, 5,6 neutronactivation analysis, 7 X-ray fluorescence, 8 ICP-AES 9,10 and ICP-MS 9,10 may be applied for the determination of uranium in complex samples, these instruments are expensive, day to day maintenance is high and they are not free from various types of inherent interference. [5][6][7][8][9][10] It is not possible to determine metal ions in complex samples when the concentration is below the detection limit of the instrument used.…”

“…[5][6][7][8][9][10] It is not possible to determine metal ions in complex samples when the concentration is below the detection limit of the instrument used. Therefore, preconcentration methods are very much needed to bring the concentration of a particular metal ion to the desired level of an instrument, like a polarograph in the present case (in this case, 7.5 µg may be concentrated from 150 ml of the aqueous sample where its concentration is as low as 50 ng/ml; such a low concentration is not possible to determine with the differential pulse polarograph, provided that it is concentrated to the desired volume).…”