Thermo Fisher Scientific (bremen) Gmbh

Thermo Electron (bremen) Gmbh

Thermo Scientific (bremen) Gmbh

Thermo Fisher Scientific Gmbh

Hans-Jürgen Schlüter

Michael Krummen

Johannes Schwieters

Michael Deerberg

Andreas Hilkert

Jürgen Jaeschke

Deike Hatscher

Alexander Duhr

Robert Malek

Eric Wapelhorst

Oliver Kracht

Jens Radke

Nils Stöbener

Benno Strasser

Tim Stoltmann

Hans-Jürg Jost

A control system for controlling a magnet of a magnetic sector mass spectrometer comprises a magnetic field sensor for sensing the magnetic field of the magnet and generating an output representative thereof; a set point generator configured to generate an output representative of, or related to, a desired magnetic field of the magnet; and a digital controller configured to receive a variable digital input signal from the output of the magnetic field sensor and a set point digital input signal from the output of the set point generator, and to generate a digital output from which is derived a control signal for controlling a current to the magnet so as to control the magnetic field thereof. The control system is arranged to apply to the digital controller a selected one of a plurality of different controller settings, in accordance with the desired magnetic field of the magnet.

Control of magnetic sector mass spectrometer magnet

A gas inlet system for introducing gas into an isotope ratio analyzer, the gas inlet system including a reference system comprising: a first supply of a reference gas having a first known isotope ratio; a supply of a carrier gas, wherein the supplies of reference gas and carrier gas are each connected by respective reference and carrier gas lines to a first mixing junction where the reference gas and carrier gas combine; a mixing zone connected downstream of the first mixing junction wherein the combined reference gas and carrier gas mix together; an exit line for transporting the mixed gas from the mixing zone to the isotope ratio analyzer; and an opening on the exit line, wherein the opening is downstream of the mixing zone. Also provided is a method of determining an isotope ratio.

Gas inlet system for isotope ratio analyzer and method of determining an isotope ratio

A method and an apparatus for providing a substance for the analysis of isotope ratios, at least some of the substance being contained in a liquid phase in which the liquid phase is subjected to electrolysis and, in the process, the substance or a pre-product for the latter is formed.

Method for providing a substance for the analysis of isotope ratios

Sample excitation apparatus for a spectrometric analyzer, the apparatus comprising a sample introduction stage comprising an electrospray nebulizer for generating a nebulized sample; and a sample excitation stage arranged to operate in an atmospheric pressure environment and to receive and excite the nebulized sample in a sample excitation region for spectrometric analysis thereof. 'Excitation' includes ionization in ICP and MIP, flame excitation in AES, and optical excitation in AAS. For example, analyte solution () is fed out of the outlet end of a capillary (), to a plasma source. A potential difference is applied between the capillary, its outlet end or the analyte solution and an opposing effective (counter) electrode, which may comprise a tube (), a grid (), or the plasma () itself, to promote formation of smaller droplets (). The pressure of the plasma source is similar to the pressure in the region of the capillary outlet end.

Sample excitation apparatus and method for spectroscopic analysis

A method for the analysis of isotope ratios, wherein at least one sample gas and/or at least one reference gas are supplied to at least one analytical device via at least one open split, the addition of a carrier gas also being possible. According to the invention, the concentration of the sample gas and/or reference gas passing into the analytical device is controlled by the supply of the respective carrier gas or by direct supply of the sample gas into the analytical device. In the device according to the invention for supplying gases to at least one analytical device, two or more capillaries are provided for sample gases, the capillaries in each case having their own drive for the movement between mixing zone and waiting zone.

Method and device for the analysis of isotope ratios

Device for the analysis of isotope ratios

A method for determining atomic isotope masses in mass spectrometry, atomic isotope ratios being determined from molecular isotope ratios measured by means of an isotope mass spectrometer&#x2014;ion correction, the determination of the atomic ratios being carried out by setting up and solving a system of equations which describes relationships between the atomic and the molecular ratios, and the system of equations having to have at least as many independent equations as there are atomic ratios. The entire system of equations is linearized by means of suitable numerical methods in a first step, in particular by means of a Taylor expansion or similar method, and in which the linearized system of equations is subsequently solved as a whole without transforming the individual equations.

Method for determining atomic isotope masses

The invention relates to a method for operating a mass spectrometer, in particular a static mass spectrometer, with an ion source and an analyzer. The invention likewise concerns the mass spectrometer. According to the invention, a gas admitted into the mass spectrometer is bonded in a concentrated manner on a cooled surface and then ionized.

Method and device for the mass-spectrometric analysis of gases

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Bremen, Germany

Hans-Jürgen Schlüter