METHOD OF POLAROGRAPHIC ANALYSIS OF INORGANIC SUBSTANCES IN SOLUTION

摘要

FIELD: analytical methods. SUBSTANCE: method includes preliminary deactivation of interfering organic substances in presence of oxygen, UV irradiation-mediated removal of dissolved oxygen, and registration of current-potential dependence from which concentrations of inorganic substances in solution are determined. Method is distinguished by that electrodes are immersed into solution being analyzed after preliminary deactivation of interfering substances, while simultaneously closing oxygen access, and by that registration of current-potential dependencies is conducted with periodical interruptions of UV irradiation for periods at least 20 s. Fullness of deactivation is determined from the shape of current-potential curves taking into consideration stabilization of anode peak height values when replotting curves. EFFECT: increased sensibility and reliability of analysis due to completeness of deactivation of interfering substances. 3 cl, 2 dwg