Abstract: An installation for treating samples by chromatographic separation comprises: i) means (1, 2, 4) for feeding moving phase, means (14) for supplying samples, and a multiplicity of injector means (10-i), each comprising a first inlet (11-i) for receiving a sample, a second inlet (8-i) connected to the feed means, and an outlet (13-i) for delivering the moving phase and/or the sample; ii) a stationary phase (3) defining a multiplicity of sample treatment channels (12-i), each starting at a first selected location (19-i) and terminating at a second selected location (20-i); and iii) a chamber (17) housing the stationary phase (3) and including pressurizing means for applying an external pressure to one face of the stationary phase, a multiplicity of inlets, each connected to the outlet (13-i) of an injector (10-i) to deliver the moving phase and/or the samples to the first locations (19-i), and a multiplicity of outlets (18-i) for discharging the multiplicity of samples treated in the channels (12-i) that have re

Abstract: Apparatus for separating the components of a sample by OPLC type chromatography using liquid under pressure, the apparatus comprises a stationary phase forming one or more sample treatment paths and means for feeding moving phase to one end of the stationary phase, with means at the opposite end of the stationary phase for collecting moving phase, means for injecting moving phase also being provided at the sides of the stationary phase in order to eliminate edge effects in the fronts of sample components and in order to separate treatment paths from one another.

Abstract: Apparatus for treating a sample by pressurized planar separation comprises a chamber (1) housing a stationary phase (2) provided at a first location (6) with a sample to be treated, pressurization means (8) for pressurizing a top face (5) of the stationary phase, dispenser means (10) for dispensing a moving phase at a second location (7) of the stationary phase, a feed inlet (13) for feeding the moving phase, and a removal outlet (18) for removing the moving phase from the chamber. The apparatus also comprises feed means (23) for feeding the inlet (13) with moving phase, a sensor (29) for measuring the pressure of the moving phase upstream from the inlet, a valve (31) placed downstream from the outlet to vary the flow rate of the moving phase leaving the chamber, and a module (25) for controlling the valve as a function of a comparison between the measured pressure and a selected threshold pressure, the valve (31) being opened when the measured pressure becomes greater than or equal to the threshold pressure.

Abstract: The invention relates to an apparatus for overpressured thin-layer chromatographic technique, comprising at least one carrier plate arranged adjacent a closed space, a sorbent layer arranged on the surface of said carrier plate, means for covering the surface of said sorbent layer under influence of overpressure generated in said closed space, a first inlet for admitting solvent to said sorbent layer, a second inlet for admitting overpressurizing medium into said closed space, a heating unit for altering temperature of said sorbent layer and a temperature control unit for energizing said heating unit. The apparatus according to the invention ensures improved efficiency of the chromatographic developments carried out under overpressure. By means of the apparatus chromatograms can be obtained with increasing speed of separation.

Abstract: The present invention relates to a chromatographic sheet and/or a system of chromatographic sheets for overpressured multilayer chromatography.One or more chromatographic sheets with sorbent layer are optionally sealed at their edges preferably by impregnation or coating with a polymer film and holed at the solvent inlet in adequate size and shape and they are optionally included in a system in single or multiple layers with or without a conventional chromatographic sheet sealed at its edges.

Abstract: The invention relates to a new polyacrylamide adhesive suitable for the fixing of fine-particle sorbent layers based on organic and/or inorganic compounds, used in overpressured one- and multilayer chromatographic procedures.The said adhesive is prepared by polymerizing the aqueous solutions of acrylamide and N,N'-methylene-bis-acrylamide in the presence of a catalyst pair at from 21.degree. to 30.degree. C., pulpifying the precipitate thus obtained and repeating the precipitation and the pulpification more times.

Abstract: An adsorbent layer (stationary phase) for a pressurized layer chromatographic apparatus, for the development of linear chromatogram, is sealed at the edges by impregnation. For the purpose of solvent control some of the adsorbent material is removed in one or several zones of the adsorbent layer near the place of solvent admission, or one or several baffle plates or wires are arranged behind the place(s) of sample application, or if necessary, the adsorbent layer is provided with a conventionally formed concentration zone in the area of the solvent admission. As a result of the impregnation, the migrating solvent composite does not escape at the edges of the adsorbent layer according to the invention in case of overpressure. As a result of the removal of adsorbent material, or the arrangement of baffles or wires, or the application of a concentration zone, the solvent migrates with a straight-line front.

Abstract: A linear overpressured thin layer chromatographic apparatus comprises a base plate 3 supporting a sorbent layer 1 over which a membrane 4 is filled. The membrane 4 is externally pressurized by a fluid medium 10. A transparent cover plate 5 is fitted over the membrane 4, and there are sealed inlets 6, 7 passing through the cover plate 5 for the introduction of the mobile phase and the samples.