ABSTRACT:
A modern and easy procedure performed using the turbidity method for the pre-concentration and estimating of Cu (II) in pharmaceutical samples. The limited solubility complex formed by the reaction of copper ions with cysteine and SDS as the surfactant. The copper content measured using the turbidity method. The effect of chemical and physical parameters including grouping of the ligand, SDS, pH, equilibration temperature and time and effect of salting are studied. The analytical qualities of the technique have been determined, which includes linear range (the range was between 0.158 -47.625µgmL 1), the coefficient of turbidity (k=13.21), limit of detection (LOD=0.1767 µg ml 1nd LOQ=0.5355 µg mL 1).All values are calculated using statistical programs, but the detection limit for Cu(II) ions based on eight times the standard deviation of the blanks (N:8) characterized as 3Sb/m (where Sb is the standard deviation of the blank and m is the slope of the calibration curve) is 0.0096µg mL-1 (3s). The method employed successfully for the determination of Cu2+ in different local pharmaceutical formations.