Hydrogen flame ionization detector

Abstract

The invention discloses a hydrogen flame ionization detector, which is characterized by comprising a detector cavity, an ignition filament, a collection electrode, a signal output end, an oxidant gasinput channel, a nozzle, a high-pressure component and a carrier gas input channel; the detector cavity is a vertical channel, the ignition filament is arranged in an ignition filament pipeline whichis communicated with the detector cavity, the signal output end is connected with the collection electrode, the oxidant gas input channel is communicated with the vertical channel, the high-pressure component extends into the vertical channel and is connected with the nozzle, the carrier gas and fuel/make-up gas input channel is communicated with the vertical channel, and the detector further comprises an electronic flow controller for controlling the input of gas; and the electronic flow controller is adopted to precisely control the gas flow, and is capable of automatically detecting the status of interior of the cavity and controlling automatic ignition and the cut-off of three ways of gas flow in the failure of ignition, so that not only can safety be achieved, but also the gas can besaved, in addition, the hydrogen flame ionization detector also has the characteristics of being simple in structure, stable and reliable, and convenient to operate.

Description

technical field [0001] The invention belongs to the field of gas chromatograph, in particular to a detector of gas chromatograph. Background technique [0002] Hydrogen Flame Ionization Detector (FID) is one of the commonly used detectors in gas chromatographs. It responds to almost all volatile organic compounds. Existing gas chromatographs use mechanical valves to control hydrogen, air and make-up gas. Gas flow such as nitrogen or helium, because the mechanical valve can only be controlled manually, it is troublesome to change the flow rate each time, and the button must be manually adjusted as shown in Figure 1, and it needs to be used manually while adjusting the gas flow manually The ignition gun completes the ignition operation; if the fire is extinguished during use but not found, it will affect the authenticity of the analysis data, so it is necessary to find a structure that is simple, stable, reliable, and easy to operate. Contents of the invention [0003] In v...

AI Technical Summary

Problems solved by technology

[0002] Hydrogen Flame Ionization Detector (FID) is one of the commonly used detectors in gas chromatographs. It responds to almost all volatile organic compounds. Existing gas chromatographs use mechanical valves to control hydrogen, air and make-up gas. Gas flow such as nitrogen or helium, because the mechanical valve can only be controlled manually, it is troublesome to change the flow rate each time, and the button must be manually adjusted as shown in Figure 1, and it needs to be used manually while adjusting the gas flow manually The ignition gun completes the ignition operation; if the fire is extinguished but not found during use, it will affect the authenticity of the analysis data, so it is necessary to find a structure that is simple in structure, stable and reliable, and easy to operate

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