Quick on-line atmospheric photo ionization mass spectrum device for effective constituent in complex substrate

A technology of atmospheric pressure photoionization and active ingredients, which is applied in the field of analysis, can solve the problems of difficult quantitative analysis of compounds inside the matrix, direct analysis of samples in the particle phase, and low compound ionization efficiency, so as to improve photon utilization efficiency and photoionization efficiency , to ensure the stability and service life of use, and to prevent pollution

Active Publication Date: 2016-05-18
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

However, since the above-mentioned analysis method mainly ionizes the compound through ions or plasma generated by electrospray ionization and ultrasonic spray ionization, the ionization efficiency of weakly polar and non-polar compounds is low; secondly, as mentioned above, the above-mentioned analysis method uses thermal The analyte is desorbed by purging the surface of the sample with air flow or plasma air flow, so the substance inside the matrix is

Method used

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  • Quick on-line atmospheric photo ionization mass spectrum device for effective constituent in complex substrate
  • Quick on-line atmospheric photo ionization mass spectrum device for effective constituent in complex substrate
  • Quick on-line atmospheric photo ionization mass spectrum device for effective constituent in complex substrate

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Embodiment 1

[0034] see figure 1 , a rapid online atmospheric pressure photoionization mass spectrometry device for effective components inside complex matrices includes a pretreatment device, an atmospheric pressure photoionization source and a mass spectrometer. The pre-treatment device includes an ultrasonic atomization mechanism, a volatile solvent introduction mechanism and a heating transmission mechanism. Atmospheric pressure photoionization source is a vacuum ultraviolet discharge lamp 15, the outside of the vacuum ultraviolet discharge lamp 15 is equipped with a third carrier gas tube 14, the outlet end of the third carrier gas tube 14 faces the light output end of the vacuum ultraviolet discharge lamp 15, and the third carrier gas tube 14 A third flow meter 13 is installed on it. The mass spectrometer is a time-of-flight mass spectrometer.

[0035] The ultrasonic atomization mechanism includes an ultrasonic atomizer 3. The ultrasonic atomization chamber 6 of the ultrasonic ato...

Embodiment 2

[0042] see figure 2 , the mass spectrometer is a quadrupole mass spectrometer. The extraction solvent 4 is made by mixing methanol and water at a volume ratio of 3:1, and the volatile solvent 9 is made by mixing toluene and anisole at a volume ratio of 1:1;

[0043] The outlet end of the main pipe 12 is perpendicular to the mass spectrometer inlet 16, the distance between the two is 15mm in the horizontal direction, and 3mm in the vertical direction.

[0044] In the positive ion mode, a voltage of -3.5KV is applied to the inlet 16 of the mass spectrometer, the flow rate of the dry gas 17 outside the sample tube 18 of the mass spectrometer is 3.5 L / min, and the temperature is 300°C.

[0045] Other structures and working principles are the same as in Embodiment 1.

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Abstract

The invention relates to a quick on-line atmospheric photo ionization mass spectrum device for an effective constituent in a complex substrate. The device comprises a pre-processing device, an atmospheric photo ionization source and a mass spectrometer, wherein the pre-processing device comprises an ultrasonic atomization mechanism, a volatile solvent introducing mechanism and a heating transfer mechanism. The device can be used for realizing the sensitive, quick and reliable qualitative and quantitative analysis after a to-be-detected sample containing complex substrate (such as, soil remained on explosion site, inferior milk power, food containing illegal additives, rootstocks of medicinal plants and the like) is directly put into the ultrasonic atomization mechanism and is subjected to ultrasonic atomization extraction, and then is delivered to and ionized at the front end of the atmospheric photo ionization source after being subjected to ultrasonic atomization and heating vaporization treatment and being converged with the volatile solvent. The device has wide application prospect at the aspects of discovery and identification of natural products, environment monitoring, criminal investigation, food safety, drug monitoring, etc.

Description

technical field [0001] The invention belongs to the technical field of analysis, and in particular relates to a fast online atmospheric pressure photoionization mass spectrometry device used for effective components inside a complex matrix. Background technique [0002] Compared with existing analysis methods, especially spectroscopic techniques (such as infrared, ultraviolet, fluorescence, etc.), mass spectrometry has attracted more and more attention in the field of analytical chemistry due to its advantages of high sensitivity, high specificity and high throughput. . At present, mass spectrometry has been widely used in the discovery and identification of natural products, environmental monitoring, criminal investigation, food safety and drug monitoring. However, due to the complexity of common untreated sample matrices (such as soil left over from explosion sites, poor-quality milk powder, foods containing illegal additives, and roots, stems and leaves of medicinal plan...

Claims

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Application Information

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IPC IPC(8): G01N27/64
CPCG01N27/64
Inventor 潘洋刘成园杨玖重朱亚楠齐飞
Owner UNIV OF SCI & TECH OF CHINA
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