SUMMARY:

The present work is devoted to the creation of solid phase analytical reagents on the base of non-functionalized silica modified with organic reagents by their adsorption. The aim was to work out the effective analytical forms for the hyphenated spectroscopic technique and the test methods, which can be used not only under stationary laboratory conditions, but also at the site of sampling. The immobilization of more than 40 organic reagents of different classes, their complexes and ion associates was studied systematically. As a result, the main factors influencing the strength of the matrix modifier fixing on the surface and the analytical properties of the immobilized reagent were established. The novel solid phase chemiluminescent and complexing reagents, and anionic exchangers were developed. Complexing abilities of the reagents immobilized were studied, and the reasons for the selectivity increase in comparison with that in solution were explained. The correlation equations obtained make possible to foresee and, moreover, to change the analytical properties of solid phase reagents. The proposed sorption-spectroscopic and semiquantitative visual methods have considerable advantages in comparison with the best analogues existing. The perspective fields of analytical application and the tendencies of further investigation were defined.
Keywords: immobilization, silica gel, hyphenated technique, test method, solid phase analytical reagents.