High voltage power supply capable of realizing simultaneous detection on positive ions and negative ions by single-tube ion mobility spectrometer

Abstract

The invention discloses high voltage power supply capable of realizing simultaneous detection on positive ions and negative ions by a single-tube ion mobility spectrometer. The high voltage power supply comprises high voltage in a control region and high voltage in a drift region; the high voltage power supply is characterized by further comprising a high voltage positive polarity and negative polarity switch control mechanism; the high voltage positive polarity and negative polarity switch control mechanism loads the positive high voltage and the negative high voltage on a drift tube in sequence in a single analyzing process of the ion mobility spectrometer, controls the ion trap and ion gate time sequences under the positive high voltage or the negative high voltage, and effectively accomplishes the simultaneous detection on positive ions and negative ions in the single analyzing process. By adoption of the solution of the high voltage power supply, more than 40 times of positive mode and negative mode switches within 10 seconds in one time of analysis by the single-tube ion mobility spectrometer can be realized for alternatively detecting the positive ions and negative ions to provide the detection results of the positive ions and negative ions simultaneously, so that the purpose of simultaneously detecting explosives, narcotics, chemical toxicants, and poisonous and harmful gases is fulfilled for providing convenience for security inspections.

Description

technical field [0001] The invention relates to a high-voltage power supply for ion detection technology, in particular to a high-voltage power supply for simultaneous detection of positive and negative ions by a single tube of an ion mobility spectrometer. Background technique [0002] Ion mobility spectrometry is a separation and detection technology that appeared in the 1970s in foreign countries. Its basic principle is: analyze and gasify solid particles or liquid samples, and the gasified samples enter the ionization chamber under the guidance of the sample gas to generate In the ionization reaction, when the ionization gate is opened, the ionized sample enters the drift region, migrates under the action of an external electric field, and realizes molecular discrimination according to the migration time. [0003] The core component of the ion mobility spectrometer is the ion drift tube; when the high voltage applied to the drift tube is a positive high pressure, the ins...

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Problems solved by technology

[0008] In view of the above problems, the present invention provides a high-voltage power supply that realizes simultaneous detection of positive and negative ions by a single-tube ion mobility spectrometer, so as to solve the problem that the ion mobility spectrometer in the prior art can only work in one mode for one analysis, and the on-site Problems that cause inconvenience

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