FIELD: analytical chemistry. SUBSTANCE: thin-layer chromatographic plate has a coat of polymeric film located of the sorption layer and fastened with its particles. The coat particles are fastened to the substrate and between themselves. In order to produce a thin-layer chromatographic plate with polymeric coat, the polymeric film is uniformly pressed to the sorption layer fixed of the substrate and is warmed up to the temperature in the range from 25 C lower than and to 5 C higher than the melting point of the film material. After the endurance it is cooled and the clamping force is removed. EFFECT: enhanced reproducibility of the results of the chromatographic division. 8 cl, 3 dwg
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