Chelating Sorbents in Analytical Chemistry

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Abstract
The importance of chelating sorbents in analytical chemistry has risen substantially in recent years. To a considerable extent this is explained by the fact that the methods of concentrating and separating chemical elements are widely used when they are determined in various objects. Sorption methods are distinguished by simplicity of implementation. They are convenient for concentrating from any, including large, volumes of solution, and are easily combined with different methods of elements determination. Owing to these advantages, the methods of concentration by sorption are successfully used in analytical chemistry.1 Concentration and separation with the help of chelating sorbents is characterized by a high selectivity and effectiveness which assures an increase in sensitivity and reliability of the subsequent determination of elements by different chemical, physicochemical, and physical methods.2