Kinetic-spectrophotometric determination of trace amounts of vanadium(V) based on its catalytic effect on the reaction of DBM-arsenazo and potassium bromate

PC-ANN assisted to the determination of Vanadium (IV) ion using an optical sensor based on immobilization of Eriochorome Cyanine R on a triacetylcellulose film

“…Tap and River water samples mL of acetate buffer solution at pH 6.00 and was kept in a refrigerator at 4 ºC [39].…”

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.…”

Micelle mediated extraction and simultaneous spectrophotometric determination of vanadium(V) and molybdenum(VI) in plant foodstuff samples

“…The vanadium and molybdenum concentration in natural waters and foodstuffs is in the order of lg L À1 (Bowen, 1979;Zhai, Zhang, & Huang, 2008) but the matrices of these samples are complicated. Therefore; it is usually necessary to apply a preconcentration method while separating the analyte from the concomitants.…”