A quadrupole mass analyzer with two-way introduction and transmission of ions

Abstract

A quadrupole rod mass analysis device for bidirectional introduction and transmission of ions. The quadrupole rod mass analysis device comprises two ion deflection devices (2) and a quadrupole rod mass analyzer (3), wherein the ion deflection devices (2) are arranged at the two axial ends of the quadrupole rod mass analyzer (3), the ion deflection devices (2) are arranged in a plane which is axially perpendicular to the quadrupole rod mass analyzer (3); and ion source vacuum interfaces (1, 5) are arranged at the two ends of each ion deflection device. The quadrupole rod mass analysis device of a simple structure breaks through the limitation of the unidirectional transmission of an existing quadrupole rod, and provides a new idea for the design of mass spectrometers. The quadrupole rod mass analysis device facilitates the research of the interaction between ions in a condition of vacuum, and can conduct separation analysis on products of ionic reaction. By adding appropriate ion receiving components, this design can also realize the surface assembling and decoration of a single-molecular layer or a multi-molecular layer.

Description

technical field [0001] The invention relates to a quadrupole mass analysis device for ion bidirectional introduction and transmission. Background technique [0002] The flight trajectories of charged particles in a mass spectrometer are fundamental to the design of the instrument. After the sample molecules are ionized by the ion source, they enter the ion transfer tube through the vacuum interface, are separated in the mass analyzer according to the mass-to-charge ratio, and finally arrive at the detector to be detected. Each of these steps requires precise control of electromagnetic fields. [0003] A quadrupole mass analyzer, referred to as a quadrupole, is the most common ion transmission and mass analysis device in a mass spectrometer. The quadrupole is a sequential mass analyzer through which the mass-to-charge analysis of the extracted ion beam can be performed. A typical quadrupole is composed of four precision-processed electrode rods and an electrode analyzer co...

AI Technical Summary

Problems solved by technology

However, with the continuous expansion of mass spectrometer applications and the emergence of the concept of preparative mass spectrometry, the design requirements of mass spectrometers are diversified, and the unidirectional quadrupole transmission device can no longer meet the needs of rapidly developing application research.

For example, using a mass spectrometer to study the interaction between ions under gas phase conditions, using the traditional one-way ion transport design will greatly limit the types and types of reactive ions, because the ions produced by the same ionization source have mutual interaction. Inhibition effect, early mixing of molecules also complicates the ionization process

The current mass spectrometer conditions can realize the exploration of single-ion reactions in the quadrupole, but it is not conducive to the study of gas-phase reactions between different types of ions. Therefore, the design of a quadrupole with dual-channel ion introduction and transmission has extensive theoretical and practical significance.

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