Heating temperature control device of miniaturized mass spectrum ion source

Abstract

The invention relates to the technical field of mass spectrum analysis, in particular to a heating temperature control device of a miniaturized mass spectrum ion source, which comprises a vacuum chamber, a temperature control system is connected outside the vacuum chamber, a heating pipe and an ion transmission system which are communicated with each other are arranged in the vacuum chamber, and the temperature control system comprises a Uamil meter, a relay, a heating power supply and a PC (Personal Computer) terminal, the heating pipe and the relay are connected in series at the two ends of a heating power supply to form a current loop, the relay is used for controlling the on-off of the current loop, the Um meter is in communication connection with a PC end, a thermocouple used for monitoring temperature is connected between the Um meter and the heating pipe, and the input end of the Um meter is connected with the thermocouple. And the output end of the temperature controller is connected with the relay and controls the on-off of the relay, so that accurate temperature control and rapid temperature rise of the solid sample are realized.

Description

technical field [0001] The present application relates to the technical field of mass spectrometry analysis, and in particular, to a heating and temperature control device for a miniaturized mass spectrometer ion source. Background technique [0002] Mass spectrometry is a widely used instrumental analysis method. In general, it refers to a specialized technology that is widely used in various disciplines to identify compounds by preparing, separating and detecting gas-phase ions. The main structure includes ion source, ion transmission device, Mass analyzer, signal detection system and vacuum system, etc. Mass spectrometers need to work in a vacuum environment. For mass spectrometers, mass spectrometry has certain requirements for samples, and the samples that can be directly received must be gaseous. Therefore, mass spectrometers should be used to study the pyrolysis reaction system of solid samples, heating Device is essential. [0003] At present, the existing temperat...

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Problems solved by technology

[0003] At present, the existing temperature-controlled heating devices for studying solid-state pyrolysis reaction systems have great limitations. First, the selection of materials for miniaturized pyrolysis furnaces (insulation layer, heating wire, and pyrolysis tubes) is insufficiently considered. coefficient and thermoelectric conversion efficiency are low, and it is impossible to realize the rapid heating of the pyrolysis tube and the high temperature above 1000°C, so it is difficult to study the high-temperature pyrolysis reaction of solid substances; secondly, the temperature control of the programmed temperature rise system used in the pyrolysis furnace is not accurate enough , the temperature fluctuation cannot be controlled within 1°C, which is not conducive to the mass spectrometry analysis of the pyrolysis reaction

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