An ion signal intensity online automatic calibration system and calibration method

An automatic calibration and ion signal technology, applied in particle separation tubes, parts of particle separator tubes, discharge tubes, etc., can solve the problems of reducing the quality of the signal generating device, unstable output ion signal intensity value, limited stability, etc. , to achieve the effect of high compensation accuracy, high degree of automation and convenient production

Active Publication Date: 2017-02-15
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

But at present, due to the limited stability of the signal generating device in its environment or the power supply module and other components, it often occurs that the output ion signal intensity value is not stable, thereby reducing the quality of the signal generating device

Method used

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  • An ion signal intensity online automatic calibration system and calibration method
  • An ion signal intensity online automatic calibration system and calibration method
  • An ion signal intensity online automatic calibration system and calibration method

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Experimental program
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Embodiment 1

[0055] For the inspection of a kind of ion signal intensity on-line automatic correction system and correction method performance of the present invention, the experiment takes 25ppmv ammonia as the test object, and the signal generating device adopts single photon ionization and chemical ionization composite ionization source-time-of-flight mass spectrometer (SPI / CI-TOF MS), using the combined ionization method of single photon ionization and chemical ionization (SPI / CI). First of all, when the signal strength online automatic calibration system and calibration method are not used, the trend of reagent ion intensity and sample ammonia ion intensity over time is tested. The electrode voltage of the lamp head is stable at 70V, and the results are as follows: Figure 5 Shown in (a). It can be seen that during the 8-hour continuous on-line monitoring, the reagent ion and sample ion intensities both decreased to a certain extent, and the relative standard deviations of the two si...

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Abstract

The invention provides an online automatic correction system and correction method for ion signal intensity. The correction system used includes a signal continuous monitoring program, an online automatic correction program, a voltage parameter control program, a power supply module and a signal generating device. The automatic calibration method is to use the above-mentioned automatic calibration system to set the ideal signal value of a certain ion monitored through the signal continuous monitoring program, and obtain the current signal value generated by the signal generating device, and then feed it back to the online automatic calibration program. After a certain comparison operation, the automatic calibration program feeds back the corrected voltage parameters to the voltage parameter control program, allowing it to control the power module to complete the automatic voltage rise and fall. The final result is that the next signal strength obtained by the signal continuous monitoring program is closer to the preset value, and feed the value back to the online automatic calibration program, and so on, so that the collected signal value is always stable around the set value.

Description

technical field [0001] The present invention relates to an online automatic correction system and correction method for ion signal strength, specifically, the automatic correction system is used to realize online compensation and correction for the ion signal value, so that it is consistent with the preset signal value, thereby maintaining a certain parameter of the device long-term stability. Background technique [0002] In practical application, the stability of the signal generating device is directly related to its application range and application prospect, especially the industrialization prospect of the device. During continuous long-term use, the stability of the signal generating device is particularly important. For example, the analytical instrument mass spectrometer commonly used in the chemical field, the ion signal intensity obtained by its ionization is greatly affected by the stability of its ionization source. The stability of the ionization source mainly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J49/00
CPCH01J49/02
Inventor 李海洋谢园园花磊陈平鞠帮玉赵无垛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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