Mass spectrometer for food detection and use method thereof

Abstract

The invention relates to a mass spectrometer for food detection, which comprises a sample introduction device, a vacuum generation device and a mass spectrometer body. The mass spectrometer body comprises an ion source device, a quadrupole device and a detector device. The vacuum generation device comprises a vacuum cavity, a molecular pump and a backing pump. The molecular pump is connected with the vacuum cavity through a connecting pipe fitting. A driving device is connected to the sample introduction device in a driving mode, and the sample introduction device comprises a membrane supporting piece and a sample introduction support. The connecting pipe fitting comprises a first air pipe, a second air pipe and connecting flanges. The connecting flanges comprise a first flange and a second flange, and a sealing assembly is arranged between the first flange and the second flange. A vacuum degree stabilizing device is arranged on the connecting pipe fitting. The vacuum degree stabilizing device comprises an air pipe damage alarm assembly and a vacuum degree keeping assembly. Compared with the prior art, the mass spectrometer has the advantages that a liquid sample can be directly input into the mass spectrometer body for detection, a complicated treatment process is not needed, and the working efficiency and the practicability of the mass spectrometer are improved.

Description

technical field [0001] The invention relates to a mass spectrometer for food detection and a method for using the same. Background technique [0002] Mass spectrometer, also known as mass spectrometer, is an instrument for separating and detecting different isotopes, that is, according to the principle that charged particles can be deflected in an electromagnetic field, a type of instrument that separates and detects the composition of substances according to the mass difference of atoms, molecules or molecular fragments of substances, mass spectrometry The instrument is divided into isotope mass spectrometer, inorganic mass spectrometer and organic mass spectrometer according to the scope of application. According to the resolution, it can be divided into high-resolution, medium-resolution and low-resolution mass spectrometers; according to the working principle, it can be divided into static instruments and dynamic instruments. At present, mass spectrometers widely used in...

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Problems solved by technology

According to the resolution, it can be divided into high-resolution, medium-resolution and low-resolution mass spectrometers; according to the working principle, it can be divided into static instruments and dynamic instruments. At present, mass spectrometers widely used include sampling devices, vacuum generating devices and mass spectrometer bodies. The mass spectrometer bodies are in The detection work is carried out in the vacuum environment generated by the vacuum generating device. During the use of this mass spectrometer, the liquid sample cannot directly enter the mass spectrometer for detection, and it needs to go through complicated processing procedures before entering the mass spectrometer for detection, which reduces the work Efficiency and practicability of the mass spectrometer. At the same time, the vacuum degree of the vacuum environment where the mass spectrometer body is located cannot be kept stable, which is easy to affect the detection process of the mass spectrometer. When the vacuum environment is damaged, the alarm cannot be given immediately, causing users Respond at the first time, thereby reducing the accuracy of the detection results of the mass spectrometer, and because the mass spectrometer needs to work within a certain temperature range, when the ambient temperature is low, the vacuum generating device and the mass spectrometer will be in the process of increasing the ambient temperature. The connection of the instrument body is prone to seal damage under the condition of alternating cold and heat, which further reduces the vacuum stability of the vacuum environment, thereby reducing the accuracy of the mass spectrometer test results, so it is necessary to make improvements

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