Ionization sensor capable of detection and its detection method for p-nitrotoluene

Abstract

The invention discloses an ionization sensor capable of detection and a detection method for p-nitrotoluene, which comprises an aluminum plate electrode plate and a carbon nanotube electrode plate, and the left and right ends of the aluminum plate electrode plate and the carbon nanotube electrode plate respectively pass through The left and right insulating support plates are separated from each other and the height of the left insulating support plate is greater than the height of the right insulating support plate. The aluminum plate electrode plate and the carbon nanotube electrode plate are respectively provided with rear and front baffles on the front and rear sides, and the left insulating support plate The internal test of the front and rear baffles is equipped with a heating resistance wire, and the left insulating support plate, the right insulating support plate, the rear baffle, the front baffle, the aluminum plate electrode plate and the carbon nanotube electrode plate form a closed cavity There is an inlet for the gas to be measured on the rear baffle, and an outlet for the gas to be measured on the front baffle. The invention can not only accurately detect the concentration of the gas to be measured, but also ionize the gas into plasma, and provide the plasma after the permanent ionization of the gas to be measured for the accurate detection of the components in the next step.

Description

technical field [0001] The invention relates to a gas sensor, in particular to an ionization sensor capable of detection and a method for using the sensor to detect the mixed gas of p-nitrotoluene and air. Background technique [0002] Existing gas sensors (such as "Carbon Nanotube Film Micro-Nano Ionization Sensor" whose authorized announcement number is CN102081071B), its detection mechanism is: by applying voltage between the electrode plates, detecting the current data between the electrode plates, To determine the gas. The sensor with this structure has the following defects: First, the accuracy of measurement is not high, because the measured current data is only a transient ion flow, and does not include ionized discharge current. When the voltage is canceled, the gas returns to its original state. state, so the measured data is not abundant, which affects the accuracy of its measurement; second, the sensor with this structure has a single function and cannot provide...

AI Technical Summary

Problems solved by technology

The sensor with this structure has the following defects: First, the accuracy of measurement is not high, because the measured current data is only a transient ion flow, and does not include ionized discharge current. When the voltage is canceled, the gas returns to its original state. state, so the measured data is not abundant, which affects the accuracy of its measurement; second, the sensor with this structure has a single function and cannot provide the plasma sensor with the plasma of the gas to be detected, because in the actual environment , only by further detection of the plasma of the detected gas can the composition of the measured gas be determined, such as toluene and xylene, in the existing gas sensors, their electrical property curves are very similar, and there is no way to distinguish them. For example, Inert gas and nitrogen, the voltage curve is also difficult to distinguish

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