Bruker Daltonik Gmbh

Other

Bruker-franzen Analytik Gmbh

Beijing Research Institute of Precise Mechatronics and Controls

Goekhan Baykut

Roland Jertz

Jochen Friedrich

Claudia Kriete

Doan Baykut

Felix Hirt

The invention relates to a method and a device for optimization of electric fields in measurement cells of Fourier transform ion cyclotron resonance mass spectrometers. The invention is based on the rationale that asymmetric electric fields with uniformly or non-uniformly perturbed field axes can appear in ion cyclotron resonance cells and therefore the axis of the magnetron orbit can become radially displaced. Shifted magnetron orbits negatively affect the cyclotron excitation, deteriorate the FT-ICR signal, increase the intensity of an even-numbered harmonics peak, lead to stronger side bands of the FT-ICR signal, and in extreme cases, cause loss of ions. The present invention helps in probing the shift of the magnetron motion, detecting parameters indicative of the offset of the electric field axis and/or correcting it by trimming it back to the geometric axis of the cell.

Correction of asymmetric electric fields in ion cyclotron resonance cells

An axial flow pump () is presented which includes a housing () with an inlet () and outlet () and a magnetically active rotor () in the housing which is provided with a passage () in the interior and with at least one spiral-shaped vane () in the passage, wherein the pitch of the vane () varies in the axial direction. The axial flow pump () furthermore includes an electromagnetic drive () with a stator () which is arranged at the housing and cooperates with a magnetically active rotor.

Axial flow pump with a spiral-shaped vane

In a method for extracting volatile substances from a vaporized liquid in which the vaporized liquid is withdrawn from an extraction chamber, a method of producing the vaporized liquid. The method includes the steps of introducing a carrier gas into the extraction chamber to form a vapor space, and spraying a liquid into the vapor space to form a vaporized liquid. An apparatus for practicing the method includes an extraction chamber in fluid communication with a liquid specimen source, and a liquid injection arrangement extending into the extraction chamber for spraying the liquid from the liquid specimen source in the vapor space to form a vaporized liquid. A carrier gas supply arrangement is provided adjacent to the extraction chamber for introducing carrier gas into the chamber to form a vapor space. The apparatus may further include a specimen chamber for collecting a predetermined amount of liquid prior to spraying.

Method and apparatus for extracting dissolved, volatile substances from

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Bremen, Germany

Goekhan Baykut