title: Spectrophtometric determination of tungsten(VI) with rutin and cetyltrimethylammonium bromide.
abstract: Tungsten-(VI) reacts with rutin in the presence of cetyltrimethylammonium bromide to form a soluble yellow complex having maximum absorbance at 416 nm. The molar ratio of tungsten to rutin in the complex is 1:2. The molar absorptivity is 5.01 x 10(4) 1.mole(-1).cm(-1). Beer's law is obeyed over the range 1 x 10(-7)(-1) x 10(-5)M tungsten (VI). Optimum solution conditions for the determination of tungsten in various sample matrices have been found and the interference of diverse ions has been examined.
authors.affiliation: Department of Chemistry, Central South University of Technology, Changsha, Hunan 410012, People's Republic of China.
authors.forename: M
authors.initials: M
authors.lastname: Xu
authors.forename: G A
authors.initials: GA
authors.lastname: Parker