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Determination of Copper (II) By Glycine in Flow Injection and Sequential Injection Techniques

Khdeeja Jabbar Ali and Nabeel Abdul Raheem Hameed

Two new, simple and rapid methods are reported for the accurate and precision spectrophotometric determination of copper (II) using flow injection analysis (FIA) and sequential analysis (SIA). Glycine has been used for determination of copper (II), Various parameters, physical and chemical, affecting the determination have been investigated such as flow rate, reaction coil, volume of reagent (glycine), volume of sample, pH and concentration of glycine. The calibration curve was prepared and the dispersion coefficient, reproducibility, interferences and application were studied. Two methods, flow injection and sequential injection analysis were compared for determination of copper (II) by glycine spectrophotommetrically at 650 nm. The linear range was (1-170 mg/L), (0.01-110 mg/L) at sampling rate of 120, 100 sample per hour, the detection limits (0.1 mg/L), (0.01 mg/L) for FIA and SIA, respectively. Relative standard deviations for (10 mg/L), n = 3 for both methods were found (0.85% for FIA and 0.00% for SIA). Dispersion coefficient was also measured for the two methods