Silica–Titania Sol–Gel Materials: Synthesis and Analytical Applications

Resumo

Data on the synthesis of silica–titania sol–gel materials and their analytical applications as new sensor materials obtained by the author are generalized. The methods of the synthesis of silica–titania xerogels with specified textural characteristics are considered. Data on heterogeneous complexation and redox reactions with the participation of silica–titania xerogels are reported. The new sensor materials based on silica–titania xerogels were used for the development of procedures for the solid-phase spectrophotometric determination of hydrogen peroxide, ascorbic acid, polyphenols, salicylic acid derivatives, and fluoride and oxalate ions and for the test determination of hydrogen peroxide and propyl gallate. The results of the application of the developed procedures to the analysis of food, pharmaceutical preparations, hygienic products, and biological liquids are given.