A lens power supply for mass spectrometer

Abstract

The invention relates to a DC (Direct Current) adjustable power supply in an analytical instrument, and particularly relates to a DC analytical instrument of a lens system for an ICP-MS (Inductively Coupled Plasma Massspectrometry) analyzer. The power supply comprises a control circuit, a voltage output circuit, a sampling circuit, a power supply module and a protection circuit, wherein the input end of the control circuit is used for receiving a control instruction of an upper computer and is connected with the power supply module and the protection circuit; the output end outputs a control signal to a voltage output circuit, the input end of the voltage output circuit is connected with the output end of the control circuit and is further connected with the power supply module and the protection circuit; the output end is connected with a lens pole piece and a sampling circuit; the input end of the sampling circuit is further connected with the power supply module and the protection circuit, and the output end of the sampling circuit is connected with the input end of the control circuit. The power supply provided by the invention is better in stability, higher in precision and simple and convenient to use, and is capable of realizing automatically controlling a computer and realizing the supply and expansion of the DC voltage in various ICP-MS analyzers conveniently.

Description

technical field [0001] The invention relates to a DC adjustable power supply in an analysis instrument, in particular to a DC adjustable power supply for a lens system in an inductively coupled plasma mass spectrometer. Background technique [0002] In the field of mass spectrometry, it is necessary to detect the content of trace elements in the sample. The trajectory of elements in the mass spectrometer lens after they become ions needs to be constrained and controlled by the effect of "field". Electric field is a confinement method that is easy to implement, low in cost and high in reliability. The stable DC adjustable power supply can provide a stable electric field, and the appropriate voltage value can control the acceleration and deceleration, focusing and divergence of the ion beam in vacuum, thereby constraining the speed and direction of ion flight. Improving the ion passing rate can effectively improve the element sensitivity, and precisely controlling the electri...

AI Technical Summary

Problems solved by technology

[0003] The ability of the existing DC adjustable power supply to absorb electrons and ions is not strong enough, resulting in insufficient stability of the power supply, resulting in unstable distribution of the electric field in the lens space

The accuracy of the power supply is not high enough to precisely control the trajectory of ions in space, so the ion resolution cannot be further improved

The compatibility and scalability of the power supply are also poor, and the designed power supply cannot be easily transplanted to other analytical instruments, and the revision of the instrument may also require a redesign of the circuit schematic, which restricts the development and replacement of the mass spectrometer

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