Entry and exit device for sample target in matrix-assisted laser desorption time-of-flight mass spectrometer

Abstract

The invention discloses a loading and unloading device for matrix-assisted laser analyzed time-of-flight mass spectrometer sample targets, and relates to time-of-flight mass spectrometers. The loadingand unloading device is provided with a main cavity, a main cavity cover plate and a molecular pump, wherein the main cavity, the main cavity cover plate and the molecular pump form a vacuum system;a two-dimensional plane moving mechanism and a connecting rod jacking mechanism are arranged inside the vacuum system, and the connecting rod jacking mechanism is arranged on the two-dimensional planemoving mechanism; the movement of the two-dimensional plane moving mechanism drives the connecting rod jacking mechanism to realize putting and fetching of the sample targets and vacuum sealing, andthe sample targets mounted in a sample target groove are moved to testing positions; a precision lead screw is driven to rotate through a coupler by a vacuum stepping motor, so that a Y direction moving block is driven to move back and forth in the Y direction, and the moving position of the sample target groove is controlled by using a positioning switch and a position recording encoder; and a similar mechanism is also adopted for the movement in the X direction as well.

Description

technical field [0001] The invention relates to a time-of-flight mass spectrometer, in particular to a device for entering and exiting a sample target of a matrix-assisted laser analysis time-of-flight mass spectrometer. Background technique [0002] Both the ionization process of the matrix-assisted laser desorption time-of-flight mass spectrometry sample and the mass spectrometry detection process of the sample are carried out in a high vacuum environment. A reliable transfer mechanism and an accurate positioning and moving mechanism are required to transfer samples under normal temperature and pressure to the vacuum system and realize multi-throughput sample testing. In the process of sample transfer, it is also necessary to ensure that the vacuum system cannot be damaged, so the entry and exit structure of the sample target is particularly important in this type of instrument. [0003] In order to realize the transfer and testing of samples in matrix-assisted laser deso...

AI Technical Summary

Problems solved by technology

The multi-link transmission mechanism has a complex structure. Due to space reasons, the link mechanism basically adopts the riveting method, which is difficult to assemble, requires high personnel, and the quality is inconsistent, and it is prone to faults such as jamming and riveting falling off; the cost is expensive; and Because the target groove for holding the sample target is in a state of no fixed connection inside the instrument, the target groove may fall off during the transportation and handling of the instrument, resulting in failure

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