Other

Ctc Analytics Ag

Cs Analytics Ag

Heiner Scherrer

Hansjörg Cueni

Werner Döbelin

Hansjörg Emil Cueni

Hansjorg Cueni

Sample pipettes used in particular for injecting samples into high pressure liquid chromatography apparatuses, which are provided with a hollow needle for drawing a sample and expelling same into a container or into a sample receiving device of the apparatus. An interchangeable cannula is mounted on the hollow needle of such a pipette, said cannula being capable of containing additional functional elements such as filters, chemically active phases and the like.

Sample pipette

The valve arrangement comprises a predetermined number of individual valve functionalities, arranged in a manner parallel to each other. A fixed connector plate () has a number of sample funnel tubes () and output connections () for forward transfer of the samples arranged offset from the above. A valve plate () with the same number of sample loops () for accommodating precisely measured sample amounts may be displaced linearly with respect to the connector plate. In a first position the sample loops are connected to the sample funnel tubes and in a second position with the output connections.

Valve arrangement

The rotating valve for high performance liquid chromatography (HPLC) has a stator with connections for the solvent reservoirs, pumps, chromatography columns etc. and a disc-shaped rotor with connecting grooves on the front face for selectively connecting different connections to one another. Said grooves are evenly distributed on two concentrical circles. The connecting grooves on the front face of the rotor are configured in the form of circular segments and are arranged in such a way that fife connections are simultaneously connected to one another in defined positions of the rotor in each circle.

Rotating valve

Process for producing a quadrupole electrode arrangement

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Büsserach, Switzerland

Heiner Scherrer