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Time-of-flight mass spectrometer

A technology of time-of-flight mass spectrometry and flight tube, which is applied to time-of-flight spectrometers, mass spectrometers, dynamic spectrometers, etc., and can solve problems such as accurate analysis results and complex system configuration.

Active Publication Date: 2012-04-04
SHIMADZU SEISAKUSHO CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The above-mentioned temperature control system has problems such as complex system configuration and the inability to obtain accurate analysis results by controlling the temperature when the ambient temperature changes too fast

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Embodiment Construction

[0024] figure 1 The main components of a time-of-flight mass spectrometer according to the invention are shown. This time-of-flight mass spectrometer can be used as a liquid chromatograph / mass spectrometer (LC / MS) by connecting a liquid chromatograph at the preceding stage. The operation of this device is described below. The sample solution containing the target component is ionized by electrospray ionization or some other method. The generated ions are introduced into a vacuum chamber 10 which is evacuated by means of a vacuum pump 14 to create a vacuum. These ions are released by the ion accelerator 11, fly through the ion flight space 16 formed in the flight tube 17, are turned around by the electric field formed by the reflector 13 arranged at one end of the flight tube 17, and fly backward through the flight space 16 , reaches the detector 12 and is detected by the detector 12. It should be noted that even though the present embodiment relates to a rotary time-of-fl...

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Abstract

There is provided a time-of-flight mass spectrometer of a simple configuration and low cost that prevents temperature drift and provides stable mass spectrum without the use of expensive Invar material for the flight tube which nevertheless is not easily affected by external vibrations and does not deflect under its own weight when held as a cantilever. The flight-tube is made of a CFRP pipe 17a whose inner and outer surfaces are provided with an electroless nickel-plated layer 17b as an electroconductive treatment. Electroconductive adhesive 21 is used for joining to flight-tube holding member 18. Unlike previous flight-tubes made of metal, flight-tubes made of CFRP pipe 17a do not deform even when no temperature adjustment and control system is used. Also, since the specific gravity of CFRP is only about one-fifth of that of stainless steel, the flight-tube does not easily deflect even when it is held as a cantilever. Furthermore, since CFRP has good vibration damping property, it is not easily affected by vibrations.

Description

technical field [0001] The present invention relates to a time-of-flight mass spectrometer for analyzing ion samples generated by an ion source, and more particularly, to a time-of-flight mass spectrometer in which changes in ambient temperature do not cause errors in measured mass-to-charge ratios of ions. Background technique [0002] With a time-of-flight mass spectrometer, different ions accelerated at approximately the same time by an electric field are introduced into a flight space formed in a flight tube. The time of flight required for the ions to reach the ion detector after traveling through the flight space is used to separate the different ions according to mass (more precisely, according to the mass-to-charge ratio m / z). The ion detector converts the time of flight to mass such that a continuous signal is detected corresponding to the number of ions reaching the ion detector. Subsequently, a mass spectrum is created in which the horizontal axis is used as the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/40H01J49/02G01N27/62G01N30/72
CPCH01J49/40
Inventor 沼田幸治
Owner SHIMADZU SEISAKUSHO CO LTD
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