Method and device for liquid delivery to the adsorbent layer

A method of liquid delivery to an adsorbent layer of a chromatographic plate, in which method a liquid stream is directed to an outer surface of the adsorbent layer, characterized in that the liquid stream is composed of at least two individual streams (26a . . . 26x), differing in quantitative and/or qualitative composition of their components, which flow in separate tubes (8a, 9a, 9b, 9c . . . 9x, 42a, 42b, 42c), which tubes in the final part of their length are connected close to each other to allow combination of the individual streams (26a . . . 26x) that emerge from the tips of the tubes (9a . . . 9x, 42a, 42b, 42c), and the individual streams combine in the space between the tips of the tubes (9a . . . 9x, 42a, 42b, 42c) and the outer surface (28) of the adsorbent layer (24), then the combined individual streams are a collective liquid stream (32), which, using a coordinate machine (2, 43), moves repeatedly together with the tips of the tubes (9a, 9b, 9c . . . 9x, 37, 42a, 42b, 42c) along a given path over and on the outer surface (28) of the adsorbent layer (24), preferably the individual streams (26a . . . 26x) are pure solvents or a solution (mixture) of these solvents and/or solution of solid and/or liquid and/or gaseous substances in one and/or various solvents, preferably the proportion of individual streams of liquid supplied to the adsorbent layer changes continuously or gradually/in steps during the development of the chromatogram and is changed depending on the migration distance of the front of the liquid/solution developing the chromatogram or depending on the time of the chromatogram development process identical to the time of liquid delivery to the adsorbent layer.