Abstract
On the basis of nonequilibrium processes production technologies of aqueous colloidal systems of chemical elements not soluble in water, in particular, selenium were developed. Selenium is a trace element with unique biological functions, which has a wide range of effects on living organisms. The aim of this work is to obtain an aqueous colloidal selenium solution, suitable for biological researches, by laser ablation and ultrasonic dispersion. The method of laser ablation allows to obtain an aqueous colloidal solution of selenium with a concentration of up to 5.6 mg/l, Zeta potential up to -14.1 mV and pH = 4.92. Using an ultrasonic homogenizer, aqueous colloidal solutions of amorphous selenium with a concentration of 9.8 mg/l, Zeta potential of 26.3 mV and pH = 6.47 were obtained. Ultrasonic dispersion method using a waveguide is more preferable for the preparation of colloidal solutions of selenium for biological research due to the higher concentration and stability at pH values close to neutral.
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