Abstract: The invention relates to cartridges for thin layer chromatography (TLC) which hermetically seal the TLC mobile phase during loading, performance of the TLC process, and analysis of the chromatogram. It further relates to associated methods of use—for example for detecting or quantifying an analyte in a sample. It further relates to processes for assembling the cartridge, to associated equipment adapted for use with them, and kits of parts.

Abstract: Throw-away syringe, of the type constituted by a cylindrical tubular body in which a stopper can be displaced in the direction of its axis being the latter controlled by a manually actuated stem and in the above syringe, between the stopper associated to the stem and the discharge end of the tubular body, is fitted freely a second stopper carrying a blade placed in an adequate setting of said stopper, a blade inoperative during the backward movement of the stopper and operative to make a mark or incision in the advance direction, a mark through which the inner pressure of the cylindrical body is equalled to the atmospheric pressure to prevent sucking out and therefore re-using the syringe after its first use.