Abstract

Owing to its antioxidant properties, selenium is an essential trace element for human life which enters the body mainly from foods of plant origin. To obtain selenium nanoparticles for the preparation of functional foods enriched in selenium, in this work, the method of mechanical dispersion was used. Colloidal solutions of selenium nanoparticles ranging in size from 20 to 100 nm were obtained by mechanical dispersion of selenium granules in distilled water using a vibrating machine of the Metapolan-2 type at a frequency of 100 Hz. The Se concentration in the solution was measured by means of atomic emission spectroscopy and reached from 2 to 10 mg/L. It has been established that the properties of colloidal selenium solutions prepared by mechanical dispersion largely depend on the material of the weighing bottle in which they are obtained. Selenium colloidal solutions obtained in plastic bottles have acidic properties, while solutions obtained in glass bottles are alkaline. Using the method of electron microscopy, it is shown that the evaporation of colloidal solutions leads to the formation of fractal structures.

中文翻译：

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机械分散法制备胶体Se水溶液

摘要

硒具有抗氧化特性，是人类生活中必不可少的微量元素，硒主要通过植物性食品进入人体。为了获得用于制备富含硒的功能食品的硒纳米颗粒，在这项工作中，使用了机械分散的方法。通过使用Metapolan-2型振动机以100Hz的频率将硒颗粒机械分散在蒸馏水中来获得尺寸为20至100nm的硒纳米颗粒的胶体溶液。溶液中的硒浓度通过原子发射光谱法测量，达到2至10 mg / L。已经确定，通过机械分散制备的胶体硒溶液的性质在很大程度上取决于在其中获得它们的称量瓶的材料。在塑料瓶中得到的硒胶体溶液具有酸性，而在玻璃瓶中得到的溶液是碱性。使用电子显微镜的方法，表明胶体溶液的蒸发导致分形结构的形成。