Extractive spectrophotometric determination of uranium with Malachite Green

Optimized and validated spectrophotometric method for the determination of uranium(VI) via complexation with meloxicam

“…Spectrophotometry is increasingly employed in process control owing to its simplicity and adaptability. Most of the reported spectrophotometric methods are tedious and time consuming because they involve prior separation of uranium from impurities by solvent extraction and reduction of Fe(III) to Fe(II) to avoid interference followed by the addition of chromophoric reagents such as thiocyanate [19], hydrogen peroxide [20], hexacyanoferrate(II) [21] and malachite green [22] to the organic phase. Therefore, there is need for a simple and selective spectrophotometric method for the determination of uranium in the presence of some other metal ions.…”

A Screening Protocol for the Direct Determination of Low PPB Levels of Uranyl Cation Using Arsenazo III and Capillary Electrophoresis

“…Most of these are expensive, time consuming and instrumentally complicated. Simpler methods have been effective which depend on spectrophotometry and require the use of masking agents or a separation such as HPLC, ion chromatography or extraction; however, most of these methods use large volumes and are slow (5,(9)(10)(11)(12)(13)(14)(15).…”

“…A variety of reagents can be used to form a complex with U(IV) or U(VI) for use in spectrophotometric analyses including PAR, PAN, malachite green and Arsenazo Ill (2,14,(21)(22)(23). Arsenazo Ill is the most widely used reagent for the determination of uranium.…”

Application of artificial neural networks coupled with an orthogonal design and optimization algorithms to multifactor optimization of a new FIA system for the determination of uranium(vi) in ore samples

“…Spectrophotometric methods for the determination of uranium(VI) have been numerous and have been used in the analysis of a large variety of materials over a wide range of uranium concentrations. 1,2 Thiocyanate 3 and oxinate 4 were usually used as chromogenic reagents for the determination of uranium, but their chromogenic reactions were neither highly sensitive nor selective. Heterocyclic azo compounds were used for the determination of many ions, including thorium 5 and uranium.…”