Thermal-wave investigation of physical and geometrical non-uniformities within thin layer chromatography (TLC) stationary phases
نویسنده
چکیده
The main goal of this paper is to demonstrate that photothermal method is an effective tool for detection of geometrical and structural non-uniformities within optically non-opaque, light scattering, planar multilayer structures. The investigated objects were plates of glass coated with silica, cellulose, aluminum oxide, polyamide or octadecylsilane. The thickness of coating ranged from 100 to 250 μm. IR active thermography measurements allow detecting and recognizing typical non-uniformities such as irregularity in thickness, absorption coefficients and physical structure of stationary phase.
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