title: Highly sensitive colour-reaction of nickel with a new chromogenic reagent benzothiaxolyldiazoaminoazobenzene and its application.
abstract: The synthesis of benzothiaxolyldiazoaminoazobenzene (BTDAB) is described, and a simple, rapid and sensitive procedure for spectrophotometric determination of nickel has been developed. At pH 9.4, in the presence of emulsifier p-octylpolyethyleneglycol phenylether (OP), the reagent reacts with nickel to form a red 1:3 (metal:ligand) complex. The nickel-BTDAB complex exhibit an adsorption maximum at 550 nm with an apparent molar absorptivity of 1.96 x 10(5) 1 mol(-1) cm(-1), Beer's law is obeyed for nickel in the range 0-7 mug per 25 ml. The proposed method has been applied to the determination of nickel in aluminum alloy with satisfactory results.
authors.affiliation: Department of Polymer Chemical Engineering, Shenyang Institute of Chemical Technology, Shenyang, Liaoning 110021, China.
authors.forename: S
authors.initials: S
authors.lastname: Zhao
authors.forename: X
authors.initials: X
authors.lastname: Xia
authors.forename: X
authors.initials: X
authors.lastname: Kong
authors.forename: T
authors.initials: T
authors.lastname: Liu