LUMINESCENT SENSOR FOR CONCENTRATION OF HEAVY METAL IONS (MAINLY COBALT) IN WATER BASED ON TERNARY QUANTUM DOTS

摘要

FIELD: measurement.;SUBSTANCE: invention relates to the field of measurement equipment and concerns a luminescent sensor for concentration of ions of heavy metals in water. Sensor is based on a solution of quantum dots of ternary composition ZnS-AgInS₂. Into aqueous solution there are introduced hybrid complexes based on calcium carbonate (CaCO₃) microspheres, doped with magnetic nanoparticles Fe₃O₄, and the triple-content quantum dots are coated with a polyelectrolyte shell consisting of alternating layers of polyallylamine hydrochloride (PAGE) and poly(4-sodium styrene sulphonate) (PSS).;EFFECT: technical result consists in reducing toxicity of sensor, high sensitivity and accuracy of determining concentration of ions of heavy metals, longer service life of sensor.;2 cl, 4 dwg