title: Simultaneous third-derivative spectrophotometric determination of copper and nickel in iron alloys and aluminium alloy.
abstract: A method is proposed for the simultaneous determination of copper and nickel by third-derivative spectrophotometry based on the absorption spectra of their complexes with cyanide ion in the ultraviolet range. The method allows the determination of 0.55-5.8 mug/ml of copper and 0.55-6.8 mug/ml of nickel. The relative standard deviation for 11 determinations of 1.5 mul/ml of copper and nickel were 0.78 and 0.72%, respectively. The detection limits were 0.10,mug/ml for nickel and 0.13 mug/ml for copper. The method has been applied to direct determination of copper and nickel in iron alloys and an aluminium alloy without any separation.
authors.affiliation: Department of Chemistry, Shandong University, Jinan, 250100, People's Republic of China.
authors.forename: N
authors.initials: N
authors.lastname: Wang
authors.forename: W
authors.initials: W
authors.lastname: Liang
authors.forename: P
authors.initials: P
authors.lastname: Qi