Thermo Fisher Scientific (bremen) Gmbh

University of Bern

Thermo Fisher Scientific Gmbh

Andreas Hilkert

Johannes Schwieters

Michael Krummen

Deike Hatscher

Alexander Duhr

Hans-Jürgen Schlüter

Reinhold Pesch

Jens Radke

Anne Trinquier

In a mass spectrometer, a mass-to-charge dispersive element separates received ions spatially according to their mass-to-charge ratios, to provide a dispersed ion beam thereby. An ion detection arrangement that detects the dispersed ion beam comprises: at least one primary ion detector, each detecting spatially separated ions having mass-to-charge ratios within a respective desired range and each providing a respective main beam signal based on its respective detected ions; and at least one secondary ion detector, each detecting ions having mass-to-charge ratios outside all of the desired ranges simultaneously with the at least one primary ion detector detecting the spatially separated ions and each providing a respective background signal based on its respective detected ions. At least one mass intensity measurement is provided for the received ions having a mass-to-charge ratio within the desired range, based on the at least one main beam signal and the at least one background signal.

Dynamic range improvement for isotope ratio mass spectrometry

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

The invention relates to a process and to an apparatus for providing gas for isotopic ratio analysis. According to the invention, a gas is generated from an eluate of a liquid chromatograph (LC). Subsequently, the gas is separated from the eluate. Finally, the gas is fed to an instrument (IRMS) for isotopic ratio analysis.

Process and apparatus for providing gas for isotopic ratio analysis

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Delmenhorst, Germany

Andreas Hilkert