ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 49, Number 2
JKCSEZ 49(2)
April 20, 2005 

A sensitive technique for the determination of trace amount of nickel(II) after the preconcentration by adsorbing on benzophenone in a column as a Ni(II)-nitroso-R salt-CTAB ternary complex was developed. Several experimental conditions such as the pH of sample solution, the amount of nitroso-R salt and cetyltrimethylammonium bromide(CTAB), the amount of benzophenone, and the flow rate of sample solution were optimized. The interfering effects of diverse ions were investigated. Co(II), Cu(II) and CN^- ion interfered more than any other ions, but these effects could be overcome sufficiently by adjusting the concentration of nitroso-R salt to be 10^-3 M. The detection limit of this technique was 2.0 ng mL^-1. Recovery yields of Ni(II) in real samples were mostly above 95%.