Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for determining compound in aerosol brown carbon

An aerosol and compound technology, applied in the field of analytical chemistry, can solve the problems of low separation degree of imidazole compounds, inability to accurately determine components, and unsatisfactory separation effect, etc., to achieve improved detection efficiency, low operation difficulty, and simple and easy-to-obtain reagents Effect

Inactive Publication Date: 2018-11-23
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI +2
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In chemical methods, ion exchange, reverse chromatography and other means are commonly used for separation, but the separation effect is not satisfactory
However, the optical quantitative method cannot accurately determine the composition of nitrogen-containing imidazole compounds in brown carbon.
[0005] In view of the shortcomings of the existing separation and analysis methods for nitrogen-containing imidazole compounds, such as low resolution and inaccurate qualitative and quantitative analysis, the method of combining CE with Q-TOF in the present invention has achieved success

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for determining compound in aerosol brown carbon
  • Method for determining compound in aerosol brown carbon
  • Method for determining compound in aerosol brown carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Sample Collection: Aerosol brown carbon samples were collected with a Teflon membrane.

[0034] Pre-treatment: Dissolve the sample in methanol, ultrasonically oscillate, extract for 30 minutes, then filter with a 0.45 μm filter membrane to remove impurities, and then use nitrogen to purge the filtrate to concentrate, and the concentrated sample is mixed with methanol-water with a volume ratio of 50:50 The mixed solvent was dissolved to form a 200 μl mixed solution.

[0035] Instrumental analysis: inject the mixed solution into capillary electrophoresis through the injection needle for separation, use methanol-water solution as the mobile phase, control the flow rate of the mobile phase to 0.5ml / h, and then enter the quadrupole-time-of-flight tandem mass spectrometer through the series tube, and compare the mixed solution Qualitative and quantitative analysis of compounds.

Embodiment 2

[0037] Sample Collection: Aerosol brown carbon samples were collected with a quartz membrane.

[0038] Pre-treatment: Dissolve the sample in methanol, ultrasonically oscillate, extract for 25 minutes, then filter with a 0.4 μm filter membrane to remove impurities, and then use nitrogen to purge the filtrate to concentrate, and the concentrated sample is mixed with methanol-water with a volume ratio of 50:50 The mixed solvent was dissolved to form a 190 μl mixed solution.

[0039] Instrumental analysis: The mixed solution is injected into capillary electrophoresis through the injection needle for separation, and then enters the quadrupole-time-of-flight tandem mass spectrometer through the series tube, and the compounds in the mixed solution are qualitatively and quantitatively analyzed.

Embodiment 3

[0041] Sample Collection: Aerosol brown carbon samples were collected with a Teflon membrane.

[0042] Pre-treatment: Dissolve the sample in methanol, ultrasonically oscillate, extract for 35 minutes, then filter with a 0.5 μm filter membrane to remove impurities, and then use nitrogen to sweep the filtrate to concentrate, and the concentrated sample is mixed with methanol-water with a volume ratio of 50:50 The mixed solvent was dissolved to form a 210 μl mixed solution.

[0043] Instrumental analysis: The mixed solution is injected into capillary electrophoresis through the injection needle for separation, and then enters the quadrupole-time-of-flight tandem mass spectrometer through the series tube, and the compounds in the mixed solution are qualitatively and quantitatively analyzed.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for determining a compound in aerosol brown carbon, which belongs to the technical field of analysis chemistry. At present, the chemical composition of the aerosol brown carbon is unknown, and the existing separation analysis method is low in separation rate for nitrogen-containing imidazole compounds in the aerosol brown carbon and inaccurate in qualitation and quantification. By virtue of the steps such as sample collection, pretreatment, instrument analysis, by utilizing a capillary electrophoresis and four-level rod flight time tandem mass spectrometry combined way, the nitrogen-containing imidazole compounds can be accurately qualified and quantified, and the obtained TIC spectrum is clear and accurate, thereby having a more important significance forresearching the brown carbon.

Description

technical field [0001] The invention belongs to the technical field of analytical chemistry, in particular to a method for measuring compounds in aerosol brown carbon. Background technique [0002] Atmospheric aerosol brown carbon has a great impact on radiative forcing, regional environmental quality, and global climate change. Aerosol brown carbon is currently considered to be mainly composed of aromatic rings, including oxygen-containing, nitrogen-containing and other large molecular weight substances, or humic acid substances. The main source is primary incomplete combustion or transformation. Primary sources include biomass combustion and motor vehicle emissions; secondary sources include high NO x Aromatic secondary organic pollutants produced under the environment. The chemical composition of the aerosol brown carbon is unknown. [0003] Capillary electrophoresis, abbreviated as CE in English, is a chromatographic separation analysis method. CE is often used for t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62
CPCG01N27/62
Inventor 肖航彭成辉张晶晶黄岑彦佟磊易辉
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com