First derivative spectrophotometric determination of uranium(VI) and vanadium(V) in natural and saline waters and some synthetic matrices using PAR and cetylpyridinum chloride

Design of a ligand suitable for sensitive uranyl analysis in aqueous solutions

“…The uranyl solutions were prepared from UO 2 (NO 3 ) 2 ·6H 2 O salt (assay: 99%, Merck); a standard stock solution of 1.0 × 10 −2 M was prepared by dissolving the appropriate amount of the salt and diluting to the required concentration with water. 1 H and 13 C NMR spectra were recorded in a Bruker spectrometer 400 MHz model DPX 500 MHz model DMX 500. UV-vis measurements were performed using an Agilent 8453 diode array spectrophotometer.…”

“…The production of the metal from mining of its ores involves large amounts of waste that increases the possibility of groundwater contamination. Design and synthesis of appropriate ligands that can be used for the analysis and extraction of the cation is essential for solving part of these problems and extensive studies have been dedicated to developing new sensitive and selective spectrophotometric reagents and improving existing procedures in order to develop simple and accessible procedures for the analysis of the cation [1][2][3][4][5][6][7][8][9][10][11] that will enable its detection in waste water.…”

Developing a New Micro Cloud Point Extraction Method for Simultaneous Preconcentration and Spectrophotometric Determination of Uranium and Vanadium in Brine

“…Simultaneous spectrophotometric determination of U(IV) and V(V) in miscellar solution has been reported earlier. 33 The proposed MCPE was successfully applied for simultaneous preconcentration and determination of U(VI) and V(V) ions in aqueous samples.…”

A spectrophotometric assay method for vanadium in biological and environmental samples using 2,4-dinitrophenylhydrazine with imipramine hydrochloride

“…Hence, accurate determination of vanadium at microgram levels using simple, rapid, and cost-effective technique is of paramount importance. Several spectrophotometric methods have been reported in the literature for the determination of vanadium in environmental and biological samples, using various reagents such as 1,8-diaminonaphthalene (Gao et al 2000), 4-(2-pyridylazo) resorcinol (Abbas et al 2001), 2-(5-chloro-2-pyridylazo)-5-dimethylaminophenol (Zucchi et al 1998), N,N -bis(2-hydroxyl-3-sulfopropyl)-tolidine (Shigenori et al 2003), 2-(2-quinolylazo)-5-diethylaminophenol (Qiufen et al 2004), variamine blue (Kiran Kumar and Revanasiddappa 2005), tannic acid (Serrat and Morell 1994), dopamine hydrochloride (Suresh Kumara et al 2007), p-methyldibromoarsenazo with potassium bromate (Zhai et al 2008), and thionine and potassium bromate (Linshan et al 2007). Many of these methods are tedious, require extraction, involve the use of activators for catalytic photometric determination, and suffer from interference by a large number of diverse ions.…”

“…Comparison of some reported methods for the determination of V with the proposed method 025-15 ng/ml Require tiron activator,Gao et al (2000) 40 • C, pH 3.8 4-(2-Pyridylazo) resorcinol and 4.0-16 μg ml −1 Less sensitive and less detectionAbbas et al (2001) cetylpyridinium chloride limit, strong interference with Fe 2+ , Cr…”