Ultrasonic atomization atmospheric-pressure glow-discharge ionization apparatus

Abstract

The invention relates to an ultrasonic atomization atmospheric-pressure glow-discharge ionization apparatus. The apparatus comprises an ultrasonic atomization apparatus, an atmospheric-pressure glow-discharge apparatus, a high-voltage power supply and a sample inlet interface, wherein the ultrasonic atomization apparatus comprises a sample inlet pipe, a sample container, a liquid inlet pump, an ultrasonic atomizer and a spraying nozzle; the sample inlet pipe is connected with the sample container and the liquid inlet pump; the liquid inlet pump is used for extracting a water sample of a liquid sample; the liquid outlet end of the liquid inlet pump is connected with the ultrasonic atomizer; and the atmospheric-pressure glow-discharge apparatus comprises a discharging needle, a high-voltage glow reaction chamber and a sample inlet conical opening. By virtue of ultrasonic atomization, the liquid sample, which is not suitable for volatilization, can be directly sampled, without requiring complex pretreatment, so that sensitive and rapid mass spectrometry can be realize; and therefore, the ultrasonic atomization atmospheric-pressure glow-discharge ionization apparatus is wide in application prospect in rapid mass spectrometry of food, pesticides, environment and the like.

Description

technical field [0001] The invention relates to the technical field of mass spectrometry, in particular to an ultrasonic atomization atmospheric pressure glow discharge ionization device. Background technique [0002] Mass spectrometry is an analytical method that separates and detects compounds according to different mass-to-nucleus ratios (m / z) to identify components and structures. Mass spectrometry is a biochemical analysis technique with high sensitivity and high selectivity. As a qualitative and quantitative chemical analysis method, it has been widely used in academic research, industrial product development, legal identification, supervision and other fields. In recent years, especially after major scientific and social events such as anti-terrorism chemical crisis, food, environmental safety and outer space exploration, the demand for on-site chemical analysis in my country and other countries in the world has surged. [0003] Ion sources working under atmospheric ...

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Problems solved by technology

It can be seen that there is a large dead volume in this reaction chamber, and at the same time, the detection process requires the use of a large flow of carrier gas (high-purity nitrogen) and needs to be heated to a higher temperature (about 300 degrees) to assist in the gasification of the sample. Therefore, it is difficult for this device to realize Real-time online monitoring, and the operability is poor, and the actual effect is not ideal

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