Electroanalytical Chemistry Laboratory, Department of Chemistry and Physics, Faculty of Education, Catholic University in Ružomberok, Hrabovská cesta 1, SK-034 01 Ružomberok, Slovakia.
Molecules. 2021 Mar 22;26(6):1768. doi: 10.3390/molecules26061768.
This short review deals with the properties and significance of the determination of selenium, which is in trace amounts an essential element for animals and humans, but toxic at high concentrations. It may cause oxidative stress in cells, which leads to the chronic disease called selenosis. Several analytical techniques have been developed for its detection, but electroanalytical methods are advantageous due to simple sample preparation, speed of analysis and high sensitivity of measurements, especially in the case of stripping voltammetry very low detection limits even in picomoles per liter can be reached. A variety of working electrodes based on mercury, carbon, silver, platinum and gold materials were applied to the analysis of selenium in various samples. Only selenium in oxidation state + IV is electroactive therefore the most of voltammetric determinations are devoted to it. However, it is possible to detect also other forms of selenium by indirect electrochemistry approach.
这篇简短的综述涉及硒的性质和测定意义，硒是动物和人类必需的微量元素，但在高浓度时具有毒性。它可能在细胞中引起氧化应激，导致慢性硒中毒。已经开发出几种用于检测硒的分析技术，但由于样品制备简单、分析速度快以及测量的高灵敏度，电化学分析方法具有优势，特别是在溶出伏安法的情况下，甚至可以达到皮摩尔/升的超低检测限。基于汞、碳、银、铂和金材料的各种工作电极已应用于各种样品中硒的分析。只有价态为+IV 的硒是电化学活性的，因此大多数伏安测定都针对它。然而，通过间接电化学方法也可以检测其他形式的硒。
