خدابخش نیکنام

A simple, sensitive and selective cloud point extraction procedure is described for the preconcentration and atomic absorption spectrometric determination of Zn2 and Cd2 ions in water and biological samples, after complexation with 3,3’,3”,3’”-tetraindolyl (terephthaloyl) dimethane (TTDM) in basic medium, using Triton X-114 as nonionic surfactant. Detection limits of 3.0 and 2.0 ?g L-1 and quantification limits 10.0 and 7.0 ?g L-1were obtained for Zn2 and Cd2 ions, respectively. Relative standard deviation was 2.9 and 3.3, and enrichment factors 23.9 and 25.6, for Zn2 and Cd2 ions, respectively. The method enabled determination of low levels of Zn2 and Cd2 ions in urine, blood serum and water samples.