Abstract: A plug unit for connecting capillary tubes includes a plug housing that has an axial borehole, a plug capillary tube that projects through the axial borehole, and a sealing element that surrounds the plug capillary tube. The front end of the plug capillary tube is sealed by an elastic and/or plastic deformation of the sealing element against the capillary tube receptacle opening of a bushing unit. A hollow cylindrical pressure piece is provided that surrounds the sealing element in an axial region facing away from the end surface of the plug capillary tube, and the pressure piece has a rearward end side that faces away from the end surface of the plug capillary tube and that can be loaded by the plug housing with an axial pressure force when the plug unit and bushing unit are connected.

Abstract: A plug unit for connecting capillary tubes includes a plug housing that has an axial borehole, a plug capillary tube that projects through the axial borehole, and a sealing element that surrounds the plug capillary tube. The front end of the plug capillary tube is sealed by an elastic and/or plastic deformation of the sealing element against the capillary tube receptacle opening of a bushing unit. A hollow cylindrical pressure piece is provided that surrounds the sealing element in an axial region facing away from the end surface of the plug capillary tube, and the pressure piece has a rearward end side that faces away from the end surface of the plug capillary tube and that can be loaded by the plug housing with an axial pressure force when the plug unit and bushing unit are connected.

Abstract: An adapter housing is described that can be used for high performance liquid chromatography, which can be releasably connected to a socket unit. The adapter housing includes a bore which passes through the adapter housing and a pre-column which can be arranged in the bore to protect the separation column from contaminants and/or to concentrate the fluid to be analyzed. A sealing element seals the adapter housing in relation to the socket unit at the end-face wall of a pilot bore.

Abstract: The invention relates to a connector unit for connecting capillaries, in particular for high-performance liquid chromatography, wherein a sealing element sealing the capillary protrudes at least partially into the interior of the capillary, while a portion of the sealing element that protrudes axially from the capillary can be subjected to a compressive force that is introduced via the capillary to obtain an axial or radial plastic and/or elastic deformation.

Abstract: A connector unit for connecting capillaries, in particular for high-performance liquid chromatography is described. A connector capillary projects through a bore of a connector housing. An annular sealing element is provided on a front end region of the connector capillary and which is composed of a plastically and/or elastically deformable material. The connector housing is formed so as to be releasably connectable to a bushing unit. The connector capillary has an inner shell composed of a plastically and/or elastically deformable material and an outer shell which engages around the inner shell and which is composed of a pressure-resistant material. The inner shell has a radially outwardly extending front end region which, on its own or together with the annular sealing element can generate a sealing action between the front end region of the connector capillary and the annular face side of the capillary receiving opening of the bushing unit.

Abstract: The invention relates to a plug unit for connecting capillary tubes, especially for high-performance liquid chromatography, with a plug housing that has an axial borehole, with a plug capillary tube that projects through the axial borehole of the plug housing, and with a sealing element that has an annular cross section and that surrounds the plug capillary tube, and the front end of the plug capillary tube is sealed by an elastic and/or plastic deformation of the sealing element against the capillary tube receptacle opening of the bushing unit, wherein the plug housing is constructed so that it can be connected detachably to a bushing unit, wherein the front end of the plug capillary tube projects into a capillary tube receptacle opening of the bushing unit when the plug unit and bushing unit are connected and with its end surface essentially aligned opposite a front end of a bushing capillary tube or a bushing capillary tube opening of the bushing unit, and the sealing element is loaded directly or indirect