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Isotope ratio mass spectrometry

A technology of isotope ratio mass spectrometry and mass spectrometer, which is applied to the separation of different isotopic elements, material analysis, material analysis by electromagnetic means, etc., and can solve the problem that ions cannot be observed

Active Publication Date: 2019-03-15
THERMO FISHER SCI BREMEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Typical GC peaks last a few seconds, so in the immediate elution of the peak, more than 2x10 5 up to 3x10 5 ions

Method used

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Examples

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Embodiment Construction

[0026] first reference figure 2 , which depicts a schematic diagram of an isotope ratio mass spectrometry (IRMS) system according to a first embodiment of the present invention in a first configuration. The IRMS system 100 has the figure 1 Some features are the same as those shown in the existing IRMS. Where identical features are indicated, the same reference numerals have been used.

[0027] IRMS system 100 comprises: injector 20; GC column 30; first multiport switching valve 110; second multiport switching valve 120; The sample is introduced into the injection port of the GC column 30 using a gas or liquid syringe (injector 20). Injector 20 provides sample input to GC column 30, which is typically housed in an oven (not shown). Column flow 35 from GC column 30 (distal end of GC column 30 ) is provided as first input 111 to first multiport switching valve 110 . A second input 112 to the first multi-port switching valve 110 is coupled to the helium flow 70 . The first ...

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Abstract

Isotope ratio mass spectrometry is effected by: injecting a sample for analysis into a gas chromatography column; directing an effluent from the gas chromatography column to a switching arrangement; and selecting a configuration of the switching arrangement, such that: in a first mode, the effluent from the gas chromatography column is provided as an input to a peak broadener; and in a second mode, an effluent from the peak broadener is provided to a mass spectrometer for isotope ratio mass spectrometry without the effluent from the gas chromatography column being provided as an input to the peak broadener.

Description

technical field [0001] The present invention relates to an isotope ratio mass spectrometry (IRMS) method and an isotope ratio mass spectrometry system. Both the methods and systems use gas chromatography. Background technique [0002] Historically, accurate and precise isotope ratios have been measured using magnetic sector instruments. Such as Orbitrap manufactured by Thermo Fisher Scientific, Inc. TM The mass analyzer's orbit-trap mass spectrometer has recently been shown to provide accurate and precise isotope measurements ("The 100-Isotope Quality Challenge: Orbitrap Mass Spectrometry as a Means for High-Dimensional Binary and Position-Specific Isotope Analysis", John Eiler, Brooke Dallas, Elle Chimiak, Johannes Schwieters, Dieter Juchelka, Alexander Makarov, Jens Griep-Raming, 2016 American Society for Mass Spectrometry poster). However, the achievable precision is limited by the number of ions detected which in turn is limited by the space charge capacity of the ion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62
CPCG01N27/62G01N30/84H01J49/0422G01N30/7206G01N2030/8868H01J49/025H01J49/4215H01J49/063H01J49/4225B01D59/44G01N2030/025
Inventor J·艾勒J·格雷普-兰明
Owner THERMO FISHER SCI BREMEN
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