Stripping analysis - new method for detection of images of heavy metals in water solutions, 1: detection of lead and cadmium
1998
Ristanovic, A. (Tehnolosko-metalurski fakultet, Beograd (Yugoslavia)) | Vucurovic, B. | Rajkovic, M.
Modern analytical chemistry must satisfy very diverse demands of modern science. Among the most important tasks is the quantitative and qualitative determination of heavy metals in various aspects of living environment in traces and ultratraces. Lead and cadmium are highly toxic heavy metals. Maximal allowed concentration in the air for steam of cadmium-oxide is around 0.1 mg/cubic m, while maximal allowed concentration for lead in the air is around 0.15 mg/cubic m and 2.56 mg/kg in food. For that reason the detection of low level concentrations of heavy metals has great importance. In this work, the method applied for lead and cadmium determination is Potentiometric Stripping Analysis, which main attribute is possibility to detect very low metal concentrations (about 10E*10 mol/cubic dm). Besides the analysis of lead and cadmium applied for concentrations 10E*6, 10E*7 and 10E*8 mol/cubic dm of standard solutions, this work contains the examinations of variable parameters influence (volume, acidity, preelectrolysis length, blending velocity) on cadmium detection by PSA method. Following the results, the conclusion west drawn concerning optimal conditions for cadmium detection (by applying PSA method).
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