title: Simultaneous determination of copper and zinc in the hair of children by pH gradient construction in a flow-injection system.
abstract: A flow-injection method is described for the simultaneous determination of copper and zinc with a single detector using the pH gradient technique. Zincon is used as the colour reagent for the spectrophotometric determination. The linear range for the determination of zinc is 0.4-12 micrograms ml-1 and for copper is 0.1-3.0 micrograms ml-1. About 20-30 samples can be determined in one hour. The proposed method has been applied to the determination of zinc and copper in childrens' hair.
authors.affiliation: Department of Chemistry, Liaocheng Teachers College, Shandong, Peoples' Republic of China.
authors.forename: R
authors.initials: R
authors.lastname: Liu
authors.forename: D
authors.initials: D
authors.lastname: Liu
authors.forename: A
authors.initials: A
authors.lastname: Sun
authors.forename: G
authors.initials: G
authors.lastname: Liu
mesh_terms: D002648:Child; D003300:Copper / Q000032:analysis*; D017022:Flow Injection Analysis; D006197:Hair / Q000737:chemistry*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D015032:Zinc / Q000032:analysis*
chemical_list: D003300:Copper; D015032:Zinc