title: [Study on solid phase extraction spectrophotometric determination of copper(II) with 2-(4-antipyrinylazo)-5-dimethylaminoaniline].
abstract: Based on the color reaction of 2-(4-Antipyrinylazo)-5-Dimethylaminoaniline (ADA) with copper (II) and the solid phase extraction of its colored complex with Waters Porapak(r) Sep-Park-C18 cartridge, a new method for the determination trace amount of copper(II) was studied. In the medium of Tween-80 and presence of pH = 4.5 buffer solution, ADA can react with copper (II) to form a stable 2:1 complex. The colored complex can extracted by Porapak(r) Sep-Park-C18 cartridge and eluted by ethanol contain 1% of acetic acid, then can be determined by spectrophotometer at 530 nm. Beer's law is obeyed in range of 0.05(1.0(g/ml. This method can be applied to the determination trace amount of copper in water with satisfactory results.
authors.affiliation: Yunnan Centers for Disease Control and Prevention, Kunming 650022, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
authors.forename: Shixi
authors.initials: S
authors.lastname: Liu
authors.forename: Jiayuan
authors.initials: J
authors.lastname: Yin
mesh_terms: D000814:Aniline Compounds; D003300:Copper / Q000032:analysis*; D013053:Spectrophotometry; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
chemical_list: C473101:2-(4-antipyrinylazo)-5-dimethylaminoaniline; D000814:Aniline Compounds; D014874:Water Pollutants, Chemical; D003300:Copper