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Calibration device and method of mass spectrum detector

A mass spectrometer detector and a calibration device technology, applied in the field of calibration devices, can solve problems affecting sampling accuracy and stability, changes in permeable membrane stability, etc., and achieve the effects of improving sampling accuracy, shortening sampling time, and reducing losses

Inactive Publication Date: 2014-07-30
FOCUSED PHOTONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the stability of the permeable membrane will also change with the prolongation of use time, thus affecting the sampling accuracy and stability
[0011] To sum up, in the current mass spectrometer coupled with gas chromatography, the common calibration methods have their own defects and deficiencies

Method used

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  • Calibration device and method of mass spectrum detector

Examples

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Embodiment 1

[0042] see figure 1 , a mass spectrometry detector calibration device, including a mass spectrometer detector 1, a standard gas, a sampling unit 3, a switching unit, a controller unit (not shown in the figure) and a pump 5.

[0043] The standard gas is provided by the standard gas cylinder 2; the standard gas can be: halogenated hydrocarbons, benzene series, p-bromofluorobenzene and other volatile organic compounds.

[0044] The sampling unit 3 includes a sampling chamber 31, a heating module (not shown in the figure) and a pressure measurement module 32; the sampling chamber 31 is connected to the pump 5, the mass spectrometer 1, and the calibration gas cylinder 2 respectively through a switching unit The heating module is arranged outside the sampling chamber 31; the pressure measurement module 32 is arranged on the sampling chamber 31 to monitor the pressure of the sampling chamber 31 in real time;

[0045] Preferably, the pressure measurement module 32 is a vacuum gauge. ...

Embodiment 2

[0070] This embodiment provides a calibration device for a mass spectrometer detector, which is an application example of embodiment 1 when calibrating a mass spectrometer detector.

[0071] see figure 1 , the mass spectrometer calibration device of this application example includes a mass spectrometer 1, a standard gas, a sampling unit 3, a switching unit, a controller unit (not shown in the figure) and a pump 5.

[0072] The standard gas is provided by the standard gas bottle 2; the standard gas is: halogenated hydrocarbon.

[0073] The sampling unit 3 includes a sampling chamber 31 , a heating module (not shown in the figure), a pressure measurement module 32 and a damping regulator 33 , and the pressure measurement module 32 is a vacuum gauge.

[0074] The switching unit includes a valve 41 , a valve 42 and a valve 43 .

[0075] The controller unit is connected with the heating unit, the pressure measurement module 32 , the switching unit and the pump 5 .

[0076] The p...

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Abstract

The invention relates to a calibration device of a mass spectrum detector, which comprises a mass spectrum detector and standard gas, and also comprises a sampling unit; the sampling unit comprises a sampling chamber, a heating module, and a pressure measuring module; the sampling chamber is connected respectively with a pump, the mass spectrum detector and the standard gas through a switching unit; the heating module is disposed outside the sampling chamber; the pressure measuring module is disposed on the sampling chamber for real-time monitoring of the pressure of the sampling chamber; the calibration device also comprises the switching unit which enables the connection and disconnection between the sampling chamber and the pump, the mass spectrum detector and the standard gas; the calibration device comprises a control personnel unit which controls the heating module, and also controls the switching unit to switch flow paths; the calibration device further comprises the pump which is controlled by the control personnel unit to extract gas in the sampling chamber. The invention also provides a calibration method of a mass spectrum detector. The calibration device and method of the invention have the advantages of good repeatability, high accuracy, and good stability.

Description

technical field [0001] The invention relates to a calibration device and method, in particular to a mass spectrometer calibration device and method. Background technique [0002] The mass spectrometer has the function of ionizing the target to be detected and detecting the ion signal intensity. The measured ion mass spectrum signal contains rich qualitative information of the target compound, and the ion intensity can reflect the content of the target compound. As an important detection method, it is widely used in various detection application fields. [0003] Among them, mass spectrometry with an electron ionization source can be used in conjunction with gas chromatography, and the detection range covers low-molecular-weight volatile organic compounds to medium-molecular-weight semi-volatile organic compounds. Developed into application fields such as environmental online monitoring and on-site portable emergency detection. [0004] No matter which application field the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/62
Inventor 吴先伟刘立鹏邓丰涛
Owner FOCUSED PHOTONICS
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