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Information × Registration Number 0220U102845, 0118U006243 , R & D reports Title Electrochemical multisensors of the new generation for express analysis of small concentrations of toxic elements and oxygen in liquid media popup.stage_title Head Kolbasov Henadii Ya., Доктор хімічних наук Registration Date 15-06-2020 Organization V.I. Vernadskii Institute of General & Inorganic Chemistry NAS of Ukraine popup.description2  Sensor electrode materials based on nanostructured films of titanium dioxide modified with gold nanoparticles, platinum, nitrogen, lanthanum ions, yttrium, as well as based on oxides of Ti, Zn, Nb, V, W, and BiVO4 were obtained. From voltammetric studies it was determined that the selective determination of copper, lead and zinc ions can be performed in citrate or nitric acid electrolytes, in the range of potentials ( + 0.4) V for Pb (II) - at pH 5-7 and -0.6 V for Cu (II). It was found that the concentration of lead ions (0.05 mg / l) on the modified TiO2 electrodes significantly affects the photoelectrochemical current in the range of 250 - 350 nm after electroconcentration at a potential of -1.4 V, characteristic for Pb2 + reduction. It was obtained that the sensitivity of IVAM and optical methods to Pb (II) was 0.1 mg / l, and the method of inversion photovoltaic (IFVA) - 0.01 mg / l, which corresponds to the maximum allowable concentration (MPC) of Pb (II) in liquids. Maximum sensitivity of the synthesized electrodes to dissolved oxygen (3 ÷ 6) • 10-3 mg / l, to copper (II) - 0,02 mg / l (MPC -1,0 mg / l), to zinc - 0,015 mg / l (MPC = 5.0), measurement accuracy 4 ÷ 5%, electroconcentration time 100-120 s. Product Description popup.authors popup.nrat_date 2020-07-03 Close