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Mass spectrum imaging method for realizing quantitative analysis and water stability monitoring of CuBTC

A technique for water stability, mass spectrometry imaging, applied in the field of analytical chemistry

Pending Publication Date: 2022-04-29
HANGZHOU INST FOR ADVANCED STUDY UCAS +1
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  • Abstract
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Problems solved by technology

When the nanoparticles are ionized, many characteristic ions suitable for qualitative can be generated. However, there is no report on the analysis of metal-organic framework nanomaterials using this device in the prior art.

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  • Mass spectrum imaging method for realizing quantitative analysis and water stability monitoring of CuBTC
  • Mass spectrum imaging method for realizing quantitative analysis and water stability monitoring of CuBTC
  • Mass spectrum imaging method for realizing quantitative analysis and water stability monitoring of CuBTC

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Embodiment Construction

[0029] In order to make the purpose, technical scheme and advantages of the embodiment of the present invention clearer, the technical scheme in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, but not the whole embodiment. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in the field without creative labor are within the scope of the present invention.

[0030] In the research, the inventor of the present application found that:

[0031] (1) in CuBTC (molecular formula: c 18 H 6 Cu 3 O 12 ), the signal intensity of characteristic peaks with m / z of 72.00, 165.1 and 209.1 is higher.

[0032] (2)m / z 165.1 and m / z 209.1 are trimellitic acid from ligands in CuBTC, which have high specificity.

[0033] (3) By calculating the peak i...

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Abstract

The invention discloses a mass spectrum imaging method for realizing quantitative analysis and water stability monitoring of CuBTC, which comprises the following steps: dropping a plurality of CuBTC samples on indium tin oxide (ITO) conductive glass, and placing the CuBTC samples in environments with the temperature of 25 DEG C and the humidity of 75% for different time lengths; a rapifleX MALDI (Matrix-Assisted Laser Desorption / Ionization) Tissutop mass spectrometer is used for measurement, qualitative and quantitative analysis is carried out on CuBTC in a range of 0-500m / z by using characteristic peaks of CuBTC, peak intensity ratios with m / z being 135.1 and 72.00 are selected as characterization values of the water stability of CuBTC, and imaging analysis is carried out. The method can intuitively realize semi-quantitative analysis and water stability monitoring of the MOF material.

Description

Technical field [0001] The application relates to a method for quantitative analysis of Cu-based trimellitic acid metal-organic framework material (CuBTC) by mass spectrometry and imaging technology and monitoring its water stability, belonging to the field of analytical chemistry. technical background [0002] In recent years, metal-organic framework materials (MOFs) have attracted much attention because of their great application potential in catalysis, gas storage, gas separation and biomedicine. It is composed of metal ions and organic ligands, with high porosity and large surface area. Therefore, in many fields, such as industry, medicine and science, metal-organic skeleton materials are considered as excellent substitutes for traditional materials. However, when the air humidity increases or other complex environmental factors exist, the stability of metal-organic framework materials will be affected. Many common gases include water vapor, NOx and NH. 3 、H 2 And SOx are lik...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/64
CPCG01N27/64
Inventor 刘倩林悦江桂斌
Owner HANGZHOU INST FOR ADVANCED STUDY UCAS
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