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Mass spectrum ion tuning method

An ion and mass spectrometry technology, applied in the field of mass spectrometry analysis, which can solve the problems of poor quantitative stability of trace components, increase labor maintenance costs, and easy pollution of instruments, and achieve optimization of analysis stability, reduction of human interference, and optimization of analysis speed. Effect

Active Publication Date: 2013-03-20
FOCUSED PHOTONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The instrument is easy to be polluted, and manual cleaning is required after contamination, which increases the cost of manual maintenance;
[0007] 2. Poor quantitative stability for trace components

Method used

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  • Mass spectrum ion tuning method

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Embodiment 1

[0034] figure 1 A flow chart of a mass spectrometer ion tuning method according to an embodiment of the present invention is schematically given, as figure 1 As shown, the tuning method includes ion filter tuning, and the ion filter tuning includes the following steps:

[0035] (B1) Pass into the mass spectrometer the background gas that does not exist in the object to be measured, such as argon, helium, etc., and obtain the components corresponding to each component S in the object to be measured respectively. 1 , S 2 ,,,S N The ion signal-to-noise intensity I 01 , I 02 ,,, I 0N , the N is a positive integer greater than 2; the mass spectrometer is a prior art in the art, and will not be repeated here;

[0036] (B2) During the analysis process of the mass spectrometer, each component S in the object to be tested is obtained 1 , S 2 ,,,S N Ion signal intensity I 11 , I 12 ,, I 1N , to further obtain the signal-to-noise ratio i=1, 2,,, N;

[0037] (B3) If N i >N...

Embodiment 2

[0050] An application example of the tuning method according to Embodiment 1 of the present invention. The measured gas contains H 2 (concentration 20-50%), CO (concentration 20-50%), CO 2 (concentration 50-70%), O 2 (Concentration 0.01~0.1%), its quantitative ions are M / Z 2, M / Z 28, M / Z 44, M / Z 32 respectively. Ar is used as the reference gas for ionization tuning, and its reference ion is M / Z 40.

[0051] The tuning method specifically includes the following steps:

[0052] (B0) Set related tuning parameters:

[0053] Quantitative ion scan time setting of the measured components, assuming T 1 = 0.1s, T 2 = 0.1s, T 3 = 0.1s, T 4 = 0.3s, respectively the minimum scanning time;

[0054] Quantitative ion maximum scan time Tn=2s;

[0055] Ionization tuning times t;

[0056] Ionization tuning time T;

[0057] Filament maximum tuning current I 调谐 ;

[0058] Filament maximum working current I 设定 ;

[0059] Filament current increment 0.1A;

[0060] Ion tuning signal ...

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Abstract

The invention provides a mass spectrum ion tuning method. The mass spectrum ion tuning method comprises ion filter tuning, wherein the ion filter tuning comprises the following steps: (B1), introducing background gas which an object to be tested is not provided into a mass spectrometer to respectively acquire ion signal noise intensity I01, I02, ... , I0N corresponding to components S1, S2, ... , SN of the object to be tested, wherein the N is a positive integer which is more than 2; (B2), acquiring ion signal noise intensity I01, I02, ... , I0N corresponding to components S1, S2, ... , SN of the object to be tested in the analysis process of the mass spectrometer to further acquire signal-to-noise ratio i=1, 2, ... , N; and (B3), if Ni is less than or equal to N0 which is a set value, prolonging the filtering time of ion corresponding to the signal-to-noise ratio and entering the step (B2). The mass spectrum ion tuning method has the advantages of high detection precision, high stability, long maintenance period, low maintenance cost and the like.

Description

technical field [0001] The invention relates to mass spectrometry analysis, in particular to a mass spectrometry ion tuning method. Background technique [0002] Online mass spectrometry separates and detects different substances according to their mass-to-charge ratios, and completes the quantitative analysis of the measured substances. Its core part mainly includes ion source, quadrupole mass filter, detector and control module. Due to the needs of online analysis, the instrument must meet the following points: [0003] 1. Long-term stable operation, reducing manual maintenance; [0004] 2. Accurate quantification of the measured components, and better long-term stability; [0005] currently existing problems [0006] 1. The instrument is easy to be polluted, and manual cleaning is required after contamination, which increases the cost of manual maintenance; [0007] 2. Poor quantitative stability for trace components. Contents of the invention [0008] In order to ...

Claims

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Application Information

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IPC IPC(8): H01J49/42
Inventor 张进伟郑利武任焱冯红年陈生龙顾海涛
Owner FOCUSED PHOTONICS
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