FIELD: chemistry.
SUBSTANCE: invention relates to the field of analytic chemistry an can be applied for the simultaneous determination of the content of Cu(II), Pb(II), Fe(III) and Bi(III) ions in different matrices. The essence of the invention: a method of the combined determination of Cu(II), Pb(II), Fe(III) and Bi(III) ions by a method of capillary zone electrophoresis includes preliminary complex-formation of the components of a sample with ethylenediaminetetraacetic acid, introduction of the sample zone into a non-modified quartz capillary, filled with a phosphate buffer electrolyte, after a zone of diglycylglycine, separation of the components at negative polarity of a voltage source, direct spectrophotometric detection at a wavelength of 260 nm, identification and quantitative determination of each component by a preliminarily built calibrating diagram or by a method of standard additives.
EFFECT: extended list of determinable components, development of a simple, sensitive and express method of determining ions of transition metals in environmental objects, wastes of industries, complex oxide materials and other objects by the method of capillary zone electrophoresis.