title: Spectrophotometric determination of trace copper in water samples with thiomichlersketone.
abstract: A simple and sensitive spectrophotometric method for determination of trace copper in water samples is proposed. In the presence of pH 4.6 HAc-NaAc buffer solution and surfactant polyethylene octyl phenyl ether (OP) medium, copper reacts with thiomichlersketone (TMK) to form a stable 1:4 complex. The complex Cu(II)-TMK-OP shows maximum absorbance at 500 nm with a molar absorptivity value of 5.7x10(4) l mol-1 cm-1. Beer's law is obeyed for copper concentrations in the range of 0-15 microg/25 ml. The average recovery of copper is between 95.8 and 106%. The method has been applied for determination of trace copper in different water samples with satisfactory results.
authors.affiliation: Material and Chemical Engineering Department, Sichuan University of Sciences and Engineering, Zigong 643000, China.
authors.forename: Dayou
authors.initials: D
authors.lastname: Fu
authors.forename: Dong
authors.initials: D
authors.lastname: Yuan
mesh_terms: D002413:Cations, Divalent / Q000032:analysis; D003300:Copper / Q000032:analysis*; D007659:Ketones / Q000737:chemistry*; D012680:Sensitivity and Specificity; D013053:Spectrophotometry; D013871:Thiones / Q000737:chemistry*; D014867:Water / Q000032:analysis*
chemical_list: D002413:Cations, Divalent; D007659:Ketones; D013871:Thiones; D014867:Water; D003300:Copper