Self pressure release single mode microwave reaction system

Abstract

A self pressure release single mode microwave reaction system belongs to the field of analysis instruments and consists of a magnetron, a single mode cavity assembly, a single mode sealing cover assembly, a sealing cover sliding assembly, a test tube assembly, a magnetic stirring assembly, an automatic pressure release assembly, an infrared temperature measuring assembly and a single mode cavity lifting assembly; since an automatic pressure release function is integrated in the system, the risk that a test tube is exploded in a reaction process is greatly reduced, and reliability of a microwave chemical reaction system is improved; in a decomposition process, if pressure in the test tube is higher than a predetermined safety pressure value, the system can release pressure automatically, and ensures safety of the decomposition process, after the pressure in the test tube is reduced to be below the safety pressure value, the system can continuously recover a sealing work state, after the decomposition work is done, the system can be subject to automatic cooling and pressure release, and can be uncapped, the whole decomposition process is fast, safe and reliable, and the system can be widely used for the design and manufacture fields of a microwave reaction device.

Description

Technical field [0001] The invention belongs to the field of chemical analysis instruments, and particularly relates to a microwave reaction device for chemical analysis. Background technique [0002] 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. [0003] The conventional detection method is that after microwave digestion, the sample is subjected to acid-fixing and other treatments, and then directly loaded into AASAtomic Absorption Spectrometry (Atomic Absorption Spectrometry) or HPLC High Performance Liquid Chromatography (High Performance Liquid Chromatography) analysis device for detection. [0004] In the above analysis process, the instability of each link will affect the accuracy of the detection results. In these links, the sample "pre-processing" step requires the highest requirements, because this loop program involves too many uncontrollable ...

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Problems solved by technology

[0015] 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 (polyetheretherketones) or glass fiber The composite sleeve has a large volume and is not suitable for use in a relatively small single-mode cavity. At the same time, the microwave field strength in the single-mode cavity is very high. Once there are impurities or contamination in materials such as PTFE and PEEK during processing or use, it is 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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