Mass Spectrometer

a mass spectrometer and mass spectrometer technology, applied in the direction of particle separator tubes, particle separator tubes, electric discharge tubes, etc., to achieve the effect of high stability, high precision and high accuracy of isotope ratio measurements
US20210013017A1Inactive Publication Date: 2021-01-14THERMO FISHER SCI BREMEN
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
THERMO FISHER SCI BREMEN
Publication Date
2021-01-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

An isotope ratio mass spectrometer has an ion source, a static field mass filter, a reaction cell to induce a mass shift reaction, and a sector field mass analyser for spatially separating ions from the reaction cell according to their m / z. A detector platform detects a plurality of different ion species separated by the sector field mass analyser. The static field mass filter has a first Wien filter that deflects ions away from a longitudinal symmetry axis of the spectrometer in accordance with the ions' m / z, and a second Wien filter that deflects ions back towards the longitudinal symmetry axis in accordance with the ions' m / z. An inverting lens is positioned along the longitudinal axis between the Wien filters to invert the direction of deflection of the ions from the first Wien filter. The static field mass filter provides high transmission and improved spectrometer sensitivity. The first and second Wien filters permit simple tuning.
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Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is a National Stage application filed under 35 USC § 371 of International Patent Application No. PCT / EP2019 / 056884, filed on Mar. 19, 2019. PCT Application No, PCT / EP2019 / 056884, claims priority to GB 1804386.9, filed Mar. 19, 2018, both of which are incorporated by reference herein in their entirety.FIELD OF THE INVENTION

[0002] This invention relates to a static field mass filter for a mass spectrometer and a mass spectrometer, in particular, but not exclusively, for isotope ratio mass spectrometry (IRMS).BACKGROUND OF THE INVENTION

[0003] Mass spectrometers are used to analyse the m / z ratios of ions which have been generated by an ion source from a sample. Before analysis, the ions might be further exposed to other processes in one or more reaction cells. Further mass filters may be used to reduce the amount of analysed ions by selecting only ions in a specific m / z range of a m / z window. Such a mass filter is arranged betw...

Claims

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