DETERMINATION OF SIMPLE SUGARS IN MEDICINAL PLANT MATERIALS BY THE METHOD OF HIGH-PERFORMANCE THIN-LAYER CHROMATOGRAPHY (FOR EXAMPLE, THE FRUITS OF SEA BUCKTHORN L. AND NETTLE LEAVES L.)
UDC 615.19.072
Abstract
An analysis of the literature over the past 20 years has shown that when controlling the quality of drugs containing monosaccharides, as well as studying the composition of simple sugars in polysaccharide complexes of medicinal plants and not only, preference is given to physicochemical methods, as the most express, sensitive and informative. No means have been found in the scientific literature to identify and quantify simultaneously various monosaccharides by high performance thin layer chromatography (HPTLC). An economical and rapid method has been developed for the identification and quantitative determination of simple reducing sugars (by the example of glucose, rhamnose and xylose) by the HPTLC method. The optimal conditions for their chromatography in a thin layer of sorbent with a quantitative interpretation of HPTLC data on a personal computer were experimentally selected and theoretically substantiated. In a detailed study of the influence of the polarity of the system on the value of Rf, the intervals of values of the polarity of the eluent were chosen, in which these dependences become linear. Using the proposed dependencies, you can select different systems for the separation of monosaccharides in a thin layer of sorbent, so that the value of Rf fit into the optimal values. The proposed method was tested on medicinal plant raw materials of nettle dioica and sea buckthorn fruits of various conservation methods. Zones of simple sugars of characteristic color were found on the chromatograms of extracts from the studied raw materials, among which glucose, xylose and rhamnose were identified by the characteristic value of Rf values in comparison with reliable standard samples. The technique can be used in quality control of substances, single-component and complex preparations, plant objects, dietary supplements, premixes and products of the food industry.
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