Automatic pressure relief type single-mode microwave reaction system

Abstract

The invention discloses an automatic pressure relief type single-mode microwave reaction system and belongs to the field of analytical instruments. The system is composed of a magnetron, a single-mode cavity assembly, a single-mode sealing cover assembly, a sealing cover slide assembly, a test tube assembly, a magnetic stirring assembly, an automatic pressure relief assembly, an infrared temperature measurement assembly and a single-mode cavity lifting assembly. Because the automatic pressure relief function is integrated in the system, the test tube burst risk in the reaction process is greatly reduced, and the reliability of the chemical microwave reaction system is improved; in the digestion process, if the test tube interior pressure is higher than a preset safety pressure value, the system can automatically relieve pressure, the safety of the digestion process is guaranteed, and after the test tube interior pressure is reduced to be less than the preset safety pressure value, the system can continuously restore a seal operating state. After the digestion is completed, the system can be automatically cooled and then relieve pressure and is uncovered, and the whole digestion process is rapid, safe and reliable. The automatic pressure relief type single-mode microwave reaction system can be widely applied to the field of design and manufacture of microwave reaction devices.

Description

[0001] This application is a divisional application. The original application date is September 15, 2015, the application number is 201510586879.7, and the invention title is "a self-relief single-mode microwave reaction system". Technical field [0002] The invention belongs to the field of chemical analysis instruments, and particularly relates to a microwave reaction device for chemical analysis. Background technique [0003] As people pay more attention to food and drug safety, the testing frequency and testing requirements for various indicators such as food and drugs are getting higher and higher. [0004] The conventional detection method is that after the sample is digested by microwave, it is processed with acid to make the volume and the sample is directly loaded to AAS (Atomic Absorption Spectrometry, atomic absorption spectrometry) or HPLC (High Performance Liquid Chromatography, high performance liquid chromatography) analysis device for detection . [0005] In the above...

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Problems solved by technology

[0016] However, the existing ordinary digestion tanks cannot be directly applied in the single-mode microwave cavity. This is mainly because the inner tank material of most common digestion tanks is PTFE (Polytetrafluoroethylene, polytetrafluoroethylene), plus PEEK (Polyetheretherketones, polyether ether ketone ) or glass fiber composite sleeve, which are large in size and are not suitable for use in a single-mode cavity with a relatively small volume. At the same time, the microwave field strength in the single-mode cavity is very high. Pollution, easy to heat and melt in the high-density microwave field, lose the pressure-bearing function, and cause the digestion tank to burst

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