title: [Simultaneous determination of trace amounts of zinc, cadmium, lead and copper by the method of anodic voltammetry using factor experimental design].
abstract: Using the method of factor planning of the experiment, the author studies and demonstrates the influence exerted by the potential and time of electrolysis, and by the concentration of the background and elements on the heights of anodal peaks upon simultaneous determination of zinc, cadmium, lead and copper microconcentrations. On the ground of statistical elaboration of the results, the optimal condition for polarographic determination through anodal voltamperometry are outlined. According to the cyclic voltametry method, the electrod processes reversibility for zinc, cadmium and lead, as well as the incomplete reversibility for copper are established; the number of electrons participating in the electrochemical reaction are found using the method of gas coulometry. The possibility of simultaneous determination of the four elements' ultramicroconcentrations after the method of voltamperometry with enrichment is proved. The standard deviation is in the range 3.02 to 4.9.
mesh_terms: D002104:Cadmium / Q000032:analysis*; D003300:Copper / Q000032:analysis*; D004563:Electrochemistry; D005163:Factor Analysis, Statistical; D007854:Lead / Q000032:analysis*; D011048:Polarography / Q000379:methods*; D012107:Research Design; D014131:Trace Elements; D015032:Zinc / Q000032:analysis*
chemical_list: D014131:Trace Elements; D002104:Cadmium; D007854:Lead; D003300:Copper; D015032:Zinc
vernacular_title: Suvmestno opredeliane na mikrokolichestva tsink, kadmiĭ, olovo i med po metoda na anodna voltamperometriia s izpolzuvane na faktorno planirane na eksperimenta.