APPARATUS FOR SAMPLE APPLICATION IN THIN LAYER AND PAPER CHROMATOGRAPHY

摘要

An apparatus for producing spots of specimens of material on a plate having a thin layer adsorbing surface, the specimens being dissolved in a diluting solvent for chromatographic analysis, with a plurality of units, each one of the units comprising a glass tube which is filled with a specimen through a funnel-like glass filling tube projecting perpendicularly from the upper surface of the specimen tube, the latter also having an open front and which is stoppered or otherwise covered by a teflon or other inert plug through which passes a capillary tube, the capillary tube having a bent front end protruding from the open front end of the glass tube so that the end of the capillary is very close to the adsorbing surface of the plate, and an air tube above the front end of the capillary which may be adjustably set to blow a low-pressure air stream onto the specimen emanating from the capillary to evaporate the solvent, thereby forming a spot of the specimen on the thin-layer adsorbing surface of the plate.