A simple, sensitive and feasible cloud-point extraction (CPE) methodology has been developed for the separation and preconcentration of cadmium and lead ions in real samples. The metals in the aqueous solution were complexes with 2-(3-indolyl)-4,5 di phynyl imidazole.(IDPI), at pH = 7.0 and Triton X-114 was added as surfactant. The variables effecting like concentration of Triton X-114 and HNO3, bath temperature, centrifuge rate and time on the cloud-point extraction were optimized. Under optimum conditions, the response are linear over concentration range of 0.025-1.3(µg mL-1) for Cd 2+ , 0.064-1.27(µg mL-1) for Pb 2+ andRSD % (n =5) 1.4 for Cd 2+ , 1.3 for Pb 2+ , detection limits (3SDb/m, n =10, m = slope of calibration) of 0.15 (µg.mL-1) for Cd 2+ and 0.13 (µg.mL-1) Pb 2+ respectively. The enrichment factors were 31 for Cd 2+ and 37 for Pb 2+. The preconcentration factors were 26 for Cd 2+ and 31 for Pb 2+ respectively.
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