Ozone modified beta radioactive ion source and application thereof

An ion source, ozone technology, applied in the field of analytical instrument mass spectrometry and ion mobility spectrometry, can solve problems such as inability to ionize, and achieve the effect of convenient switching and expanding range

Inactive Publication Date: 2013-06-19
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And for electron affinity less than O 2 compounds (such as SO 2 , CO 2 etc.) cannot ionize

Method used

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  • Ozone modified beta radioactive ion source and application thereof
  • Ozone modified beta radioactive ion source and application thereof
  • Ozone modified beta radioactive ion source and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] image 3 Ozone modified 63 Ni source (a) and 63 Mobility spectrum of negative reagent ions obtained from Ni source (b). It can be seen from the figure that the reagent ions obtained by the two ionization sources are different, and the ozone modified 63 The reagent ion peak obtained by Ni source has 2.55V / cm -2 the s -1 the migration rate, 63 The reagent ion obtained by Ni source has 2.38V / cm -2 the s -1 the migration rate. Ozone modification 63 The reagent ion obtained from the Ni source is O 3 - (H 2 O) n ,and 63 The reagent ion obtained from the Ni source is O 2 - (H 2 O) n . This indicates that the ozone modification 63 The Ni source has its own unique negative reagent ion.

Embodiment 2

[0034] Figure 4 Ozone modified 63 Ni source (a) and 63 Ni source (b) is detecting CCl 4 Migration spectra obtained when. It can be seen from the figure that CCl 4 Both ionization sources can form a mobility of 2.69V / cm -2 the s -1 The product ion peak, the ion is formed by the reagent ion and CCl 4 Generated by electron transfer reaction.

Embodiment 3

[0036] Figure 5 Ozone modified 63 Ni source (a) and 63 Ni source (b) detects SO 2 Migration spectra obtained when. It can be seen from the figure that when using ozone modification 63 Ni source, SO can be observed 2 The formed mobility is 2.28V / cm -2 the s -1 The product ion peak of , while using 63 The Ni source fails to observe the corresponding SO 2 product ions. This result demonstrates that the ozone modified 63 Advantages of Ni-sourced reagent ions in expanding the range of detectable compounds.

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Abstract

The invention relates to an ion source in an analytical instrument, in particular to a beta radioactive ion source modified by ozone. A part of O2 in clean air is firstly translated into O3 through an ozone generating device and then enters the beta radioactive ion source, and O2-(H2O)n reagent ions generated by the clean air in the beta radioactive ion source are reacted with O3 to generate new reagent ions O3-(H2O)n. The new generated reagent ions can not only generate electron transfer reaction with electronegative compounds (such as explosive some substances and halogen compounds), but also generate O- transfer reaction with some components (such as SO2 and CO2), so that number of the channels of compound ionizing in the beta radioactive ion source are increased, and the enlargement of detectable range of the compounds can be benefited.

Description

technical field [0001] The invention relates to analytical instrument mass spectrometry and ion mobility spectrometry, and in particular to the ion source technology of the instrument. The use of ozone-modified β-radiation ion source can increase the ionization channel of compounds in the ion source and expand the range of ionizable compounds. Background technique [0002] Ion mobility spectrometry is a material analysis and detection technology developed since the early 1970s. The basic principle it adopts is that ions generated under atmospheric pressure conditions, under a specific electric field characteristic, when drifting from the same starting point and passing the same distance, different ions will take different times due to their different mobility, and measure this Substances can be qualitatively monitored in no time. Ion mobility spectrometry has the advantages of high detection sensitivity, fast detection speed, online rapid detection, and low detection cost. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/10G01N27/62
Inventor 李海洋陈创杜永斋程沙沙周庆华
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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