title: Single-sweep polarography of the copper(II)-3-hydroxy-1-p-sulphonatophenyl-3-phenyltriazene complex and its analytical applications.
abstract: A polarographic investigation of the copper-3-hydroxy-1-p-sulphonatophenyl-3-phenyltriazene (HSPT) complex in 0.05 M sodium tetraborate medium is described and a simple and sensitive single-sweep polarographic method for the determination of trace amounts of copper in biological samples is proposed. The complex was shown to be Cu(HSPT)2 with log beta' = 11.38. The polarographic wave is caused by the reduction of copper(II) in the adsorbed complex to copper amalgam on the surface of a mercury electrode. The current peak is directly proportional to the concentration of copper in the range 8.0 x 10(-9)-4.0 x 10(-6) M and the detection limit is 5.0 x 10(-9) M.
authors.affiliation: Department of Chemistry, Wuhan University, Hubei, People's Republic of China.
authors.forename: Z Q
authors.initials: ZQ
authors.lastname: Gao
authors.forename: Z F
authors.initials: ZF
authors.lastname: Zhao
authors.forename: L Q
authors.initials: LQ
authors.lastname: Sheng
mesh_terms: D003300:Copper / Q000097:blood*; D004566:Electrodes; D006801:Humans; D007202:Indicators and Reagents; D009942:Organometallic Compounds; D011048:Polarography / Q000379:methods*; D014226:Triazenes
chemical_list: D007202:Indicators and Reagents; D009942:Organometallic Compounds; D014226:Triazenes; C065862:copper (II) 3-hydroxy-1-(4-phenylsulfonic acid)-3-phenyltriazene; D003300:Copper