Ion signal intensity on-line automatic correction system and method

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

Active Publication Date: 2015-06-17
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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  • Ion signal intensity on-line automatic correction system and method
  • Ion signal intensity on-line automatic correction system and method
  • Ion signal intensity on-line automatic correction system and method

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Embodiment 1

[0055] Aiming at the examination of the performance of a kind of ion signal intensity on-line automatic correction system and correction method described in the present invention, the experiment takes 25ppmv ammonia gas as the test object, and the signal generation device adopts single photon ionization and chemical ionization composite ionization source-time-of-flight mass spectrometer (SPI / CI-TOF MS), using the compound ionization method of single photon ionization and chemical ionization (SPI / CI). First, the time-varying trends of reagent ion intensity and sample ammonia ion intensity were tested without using the signal intensity online automatic calibration system and calibration method. The lamp head electrode voltage was stabilized at 70V, and the results are shown in Figure (a). It can be seen that during the 8-hour continuous on-line monitoring, the reagent ion and sample ion intensity both decreased to a certain extent, and the relative standard deviations of the sig...

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Abstract

The invention provides an ion signal intensity on-line automatic correction system and method. The correction system comprises a signal continuous monitoring program, an on-line automatic correction program, a voltage parameter control program, a power source module and a signal generation device. The automatic correction method uses the automatic correction system, an ideal signal value of a monitored ion is set through the signal continuous monitoring program, a current signal value generated by the signal generation device is obtained and then fed back to the on-line automatic correction program, the on-line automatic correction program feeds corrected voltage parameters back to the voltage parameter control program after certain comparison and computing, the voltage parameter control program is made to control the power source module to finish automatic boosting and reduction of voltage, the final result is that the next signal intensity obtained by the signal continuous monitoring program is closer to a preset value, and the value is fed back to the on-line automatic correction program. Operation is repeated in this way, and the collected signal values are always stabilized near 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 Applications(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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