Bruker Saxonia Analytik Gmbh

Druckfarbenfabrik Gebr.schmidt Gmbh

Brucker-Saxonia Analytik Gmbh

Hans-Rudiger Doring

Gerhard Weiss

Stefan Klepel

Roland Schnurpfeil

Jorg Peuker

Reiner Mehnert

Gerd Arnold

Joachim Adler

Hans-Peter Seng

Thomas Robel

The invention relates to a switchable ion mobility spectrometer (IMS) with ring electrodes divided into half-rings, which surround the drift chamber of the IMS. In a first operating condition, the two half-rings of each ring electrode are at the same potential and the various ring electrodes are at different potential varying monotonously along the drift path. In this way, ions are transported in the conventional manner along the drift path. In a second operating mode, the half-rings of the ring electrodes are at different potentials, by which the ions are each deflected toward one of the half-rings. The currents thus resulting are captured by the corresponding half-rings, amplified and an ion mobility spectrum is produced. A favorable design for the IMS can be used in many different modes of operation.

Ion mobility spectrometer with switchable electrodes

An ion mobility spectrometer (IMS) with electric drift fields directed at a central detector electrode. The IMS is rotationally symmetrical and has a disk shape.

Ion mobility spectrometer in a centripetal arrangement

In a method for photo-ionization ion mobility spectrometry, a reagent gas is added, in particular an aromatic compound, which has a large ionization cross section in the range of ionizing VUV radiation, but a low probability for the formation of protonated quasi-molecular ions. In this way, the detection of only weakly proton affine substances is also amplified or even made possible at all, and also the detection of electronegative substances in a negative operating mode is improved. Preferred reagent gases are benzene, toluene and xylene. FIG. 1

Photo-ionization ion mobility spectrometry

Method for the quality-controlled treatment of surfaces with a radiation-cured surface treatment, in which a finishing formulation is applied to the surface and is polymerically crosslinked under the effect of radiation. To enable the quality control to be conducted non-destructively and at reduced cost, it is proposed that the finishing formulation contains a proton-affinitive indicator substance analyzable by ion mobility spectroscopy and that the indicator substance escaping from the printed or coated surface after the radiation curing is analyzed by means of ion mobility spectroscopy.

Method for the quality-controlled finishing of a surface with a

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Leipzig, Germany

Hans-Rudiger Doring