Ion mobility spectrometry trace permeation device

Abstract

The invention discloses an ion mobility spectrometry trace permeation device which comprises a release tube, a permeable membrane and a heating and heat preservation device, a calibration reagent placement cavity is formed in the release tube, and volatilization holes are formed in the tube wall of the release tube and communicated with the calibration reagent placement cavity; the permeable membrane covers the volatilization hole of the release tube; a heating and heat preservation cavity is formed in the heating and heat preservation device, a release pipe provided with a permeable membranecan be contained in the heating and heat preservation cavity, the heating and heat preservation cavity is communicated with the air inlet channel and the air outlet channel, and air flow can be formedin the heating and heat preservation cavity. The ion mobility spectrometry trace permeation permeation device provided by the invention has a temperature control function and a flow control function,so that stable volatilization of a calibration reagent can be ensured; and meanwhile, the permeation amount of the calibration reagent can be subjected to air control, so that the problems in the prior art can be effectively solved.

Description

technical field [0001] The invention relates to ion detection technology, in particular to ion mobility spectrometer technology. Background technique [0002] In order to ensure the accuracy of the detection in the on-site detection of the ion mobility spectrometer, a reagent is required to perform mandatory automatic calibration of the inspection program at regular intervals. Calibration reagents are generally selected to be those that can volatilize stably under a certain temperature and air flow. [0003] At present, the commonly used methods are: manual calibration and automatic calibration. [0004] The common manual calibration method can only rely on experience, and the measurement is not easy to control, and it cannot be calibrated from time to time. [0005] The common automatic calibration method is only to choose the free volatilization of the calibration reagent, such as using a simple tetrafluoro tube, sealing the calibration reagent at both ends and allowing ...

AI Technical Summary

Problems solved by technology

The volatilization is not easy to control, it volatilizes quickly when the temperature is high, and the volatilization may decrease when the weather is cold

Although some process temperature control, but the permeation device is too complicated, and the permeation volume is too large, it is easy to produce excess, and the condensing air pipe along the way is blocked, etc.

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