Abstract
The test methods of chemical analysis with the use of various versions of planar chromatography are considered. Cellulose paper and thin silica gel layers on polymer supports are used as stationary-phase carriers. The test solution serves as a mobile phase. The length of a colored or decolorized zone in test strips (laminated in a transparent polymer film) obtained by contact with the test solution through a small orifice or slot in the film serves as an analytical signal. Planar chromatography in the test methods of chemical analysis is classified in accordance with the mechanism of interactions between the mobile and stationary phases: precipitation, acid-base (proton-exchange), chemisorption, complexation, redox (electron-exchange), catalytic, and adsorption chromatography. Examples of stationary phases and particular analytical applications are given.
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