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Quadrupole mass analyzer

一种质量分析装置、质量的技术，应用在测量装置、分析材料、轨迹稳定型分光仪等方向，达到提高数据分辨率、提高时间分辨率、缩短重复周期的效果

Active Publication Date: 2011-05-04
SHIMADZU SEISAKUSHO CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In this way, the period of the scan margin for stable measurement, which is set outside the mass range required for mass spectrometry, is a useless period for substantial mass analysis, similarly to the adjustment time described above.

Method used

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Embodiment Construction

[0035] A quadrupole mass spectrometer as an embodiment of the present invention will be described with reference to the drawings. figure 1 It is a configuration diagram of main parts of the quadrupole mass spectrometer of this embodiment. to what has been explained Figure 6 The same structural elements are assigned the same reference signs. The quadrupole mass spectrometer of this embodiment is a device for introducing a gaseous sample into the ion source 1, and a gas chromatograph can be connected to the preceding stage of the mass spectrometer. In the case of a configuration for analyzing a liquid sample, an atmospheric pressure ion source such as an electrospray ion source is used as the ion source 1. 3. The detector 4 is arranged in a high-vacuum environment, as long as it is configured as a multi-stage differential exhaust system. In this case, a liquid chromatograph can be connected to the preceding stage of the mass spectrometer.

[0036] In the quadrupole mass spe...

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Abstract

In a scan measurement which repeats a mass scan over a predetermined mass range, undershoot is caused when returning a voltage from an end voltage of one scan to a start voltage of the next scan, which makes a voltage value unstable and requires a wait time. Conventionally, the wait time has been set to a constant value not depending on the analysis condition. In a quadrupole mass analyzer of thepresent invention, a mass difference DeltaM between the scan end mass and the scan start mass is calculated according to a specified mass range and a different settling time is set in accordance withthe mass difference. When the mass difference DeltaM is small and the voltage stabilizing time is short, a relatively small settling time is set. This can shorten the mass scan repetition cycle and improve the time resolution.

Description

technical field [0001] The present invention relates to a quadrupole mass spectrometer using a quadrupole mass filter as a mass analyzer for separating ions according to mass (strictly, according to m / z). Background technique [0002] As one of mass spectrometers, a quadrupole mass spectrometer using a quadrupole mass filter as a mass spectrometer for separating ions by mass is known. Figure 6 It is a schematic configuration diagram of a general quadrupole mass spectrometer. [0003] The sample molecules are ionized in the ion source 1 , and the generated ions are collected (and sometimes accelerated) by the ion lens plasma transport optical system 2 and introduced into the space in the long axis direction of the quadrupole mass filter 3 . The quadrupole mass filter 3 is composed of 4 ( Figure 6 Only 2) rod electrode configurations are depicted in . A voltage ±(U+V·cosωt) obtained by adding a DC voltage ±U and a high-frequency voltage ±V·cosωt is applied to each rod elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/42G01N27/62
CPCH01J49/4215H01J49/429
Inventor 向畑和男中野茂畅藤本穰
Owner SHIMADZU SEISAKUSHO CO LTD