Four azo dyes known to form anionic complexes with V (V) were investigated as potential
liquid–liquid extraction–spectrophotometric reagents for the antihistamine medication …

A new liquid—liquid extraction system for molybdenum (VI) was studied. It contains 4-
nitrocatechol (4NC) as a complexing chromogenic reagent and benzalkonium chloride …

A novel chromogenic system for the liquid-liquid extraction and determination of trace
amounts of tungsten (VI) was investigated. The system comprises 4-nitrocatechol (4NC) as a …

Abstract Nano-sized bimetal Cu–Fe silica catalyst (Cu–Fe–SiO2/S) had been directly
prepared by supercritical one-step method from sodium silicate to catalyze phenol …

The present book is part of series published on Spectrophotometric methods for
determination of various transition metals. Since vanadium chromium and manganese are …

Vanadium comprises 0.019 percent of the Earth's crust and is found in minerals, including
magnetite, vanadite, carnotite, and patronite. It is usually obtained by heating crushed ore in …