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Electrospray mass spectrometry coupling method for porous electrode electrochemical cell and liquid sample analysis

A technology of electrospray mass spectrometry and porous electrodes, which is applied in the direction of material analysis, scientific instruments, and analytical materials through electromagnetic means, and can solve the problems of low redox efficiency of batteries, difficulty in matching high and low voltages, and unfree choice of solvents, etc.

Inactive Publication Date: 2011-11-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the high and low voltages are difficult to match, the background oxidation, the solvent selection is not free, and the redox efficiency of the battery is low when the electrochemical cell is coupled with the electrospray mass spectrometer in the past. Electrospray Mass Spectrometry-Coupled Method for Determination of Cell and Liquid Samples

Method used

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  • Electrospray mass spectrometry coupling method for porous electrode electrochemical cell and liquid sample analysis
  • Electrospray mass spectrometry coupling method for porous electrode electrochemical cell and liquid sample analysis
  • Electrospray mass spectrometry coupling method for porous electrode electrochemical cell and liquid sample analysis

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Embodiment 1

[0024] The porous electrode electrochemical cell and the liquid sample analysis electrospray mass spectrometry coupling method of the present invention are used for the analysis of the oxidation of Dopamine (molecular weight MW 153Da). The instrument conditions are shown in Table 1 below, and the mass spectrogram when the porous electrode electrochemical cell is closed is shown in figure 2 , the mass spectrogram of the porous electrode electrochemical cell is shown in image 3 , the extracted oxidation product ion [DQ+H] + (m / z 152) mass spectrum see Figure 4 .

[0025] Table 1 Porous electrode electrochemical cell and liquid sample analytical electrospray mass spectrometry conditions for the analysis of dopamine

[0026]

[0027] from Figure 2-4 It can be seen that when the porous electrode electrochemical cell is closed, the ions detected by the mass spectrometer are quasi-molecular ions [Dopamine+H] protonated by Dopamine (molecular weight MW 153Da) + (m / z 154) a...

Embodiment 2

[0029] The porous electrode electrochemical cell and the liquid sample analysis electrospray mass spectrometry coupling method of the present invention are used in negative ion mode to analyze the oxidation of 3,4-dihydrophenylacetic acid (molecular weight MW 168Da). The instrument conditions are shown in Table 2 below, and the mass spectrogram when the porous electrode electrochemical cell is closed is shown in Figure 5 , the mass spectrogram of the porous electrode electrochemical cell is shown in Image 6 .

[0030] Table 2 Porous electrode electrochemical cell and mass spectrometry conditions for analysis of 3,4-dihydrophenylacetic acid

[0031]

[0032] from Figure 5-6 It can be seen that when the porous electrode electrochemical cell is closed, the ions detected by the mass spectrometer are deprotonated quasi-molecular ions [M-H] of 3,4-dihydrophenylacetic acid (molecular weight MW 168Da) + (m / z 167) and its removal from [CO 2 ] Fragment ion [167-CO 2 ] (m / z 13...

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Abstract

The invention relates to a porous electrode electrochemical cell and a liquid sample analytical electrospray mass spectrometry coupling method, which mainly solves the problems of difficult matching of high and low voltages, background oxidation, unfree solvent selection and battery oxidation in the conventional electrochemical cell and electrospray mass spectrometry coupling. / Restore the problem of low efficiency. In the present invention, the porous electrode electrochemical cell (2) is oxidized or the porous electrode electrochemical cell (2) is oxidized or The technical scheme that the reduced product enters the mass spectrometer (3) for detection after direct analysis or ionization can solve this problem well, and can be used in the industrial production of electrochemical cells and mass spectrometry.

Description

technical field [0001] The invention relates to a porous electrode electrochemical cell and a liquid sample analytical electrospray mass spectrometry coupling method. Background technique [0002] The combination of electrochemical Electrochemistry and mass spectrometry is an effective tool for studying electrochemical reaction products and intermediates, and can be used for mechanism research of redox reactions. The advantage of using mass spectrometry as an electrochemical detector is that mass spectrometry can provide molecular weight information, and tandem mass spectrometry can also provide structural analysis. Traditional mass spectrometry ionization methods coupled with electrochemical EC include thermal spray TS, fast atom bombardment FAB and electrospray ESI. Electrospray mass spectrometry (ESI-MS) is an effective means for ionizing non-volatile, polar, thermally stable compounds and biological macromolecules. The coupling of electrochemical EC and electrospray mas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/416
Inventor 李继文
Owner CHINA PETROLEUM & CHEM CORP