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

Online enrichment system for gaseous and granular semi-volatile organic compounds and method and application

A semi-volatile and organic technology, applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problems of low recovery rate, large instrument volume, and failure to meet the detection limit requirements of detectors, etc.

Pending Publication Date: 2020-10-09
PEKING UNIV
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, gaseous semivolatile organic compound measurement technology has been developed, such as dual-channel SV-TAG, which captures all gaseous and particulate semivolatile organic compounds through metal filter membranes, and compares the total semivolatile organic compound content with The content of gaseous semi-volatile organic compounds is obtained by difference calculation of the content of particulate semi-volatile organic compounds. The content of gaseous semi-volatile organic compounds obtained by the difference method has the problem of large gas particle distribution errors, resulting in a lack of scientific data
[0005] The current SVOCs measurement technology has the following problems: the gaseous particulate semi-volatile organic compounds cannot be directly measured, the off-line sampling time is discontinuous, the collection time is too long, the content of SVOCs in the sample is low, and the direct analysis cannot meet the detection limit requirements of the detector and the recovery rate. Low, the instrument volume is too large, etc.
[0006] Through the search, no patent publications related to the patent application of the present invention have been found

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
  • Online enrichment system for gaseous and granular semi-volatile organic compounds and method and application
  • Online enrichment system for gaseous and granular semi-volatile organic compounds and method and application
  • Online enrichment system for gaseous and granular semi-volatile organic compounds and method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0079] The present invention will be described in further detail below in conjunction with specific examples. The following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

[0080] Structures not described in detail in the present invention can be understood as conventional structures in the art.

[0081] An online enrichment system for gaseous and particulate semi-volatile organic compounds, such as figure 1 As shown, the system includes a gasification chamber 1, an electromagnetic three-way valve 2, a first two-position six-way valve 3, a particle trap 5, a primary trap 6, a secondary focusing trap 7, a second two-position Six-way valve 8, first mass flow controller 9, second mass flow controller 17, sampling pump 10, gas chromatography mass spectrometry detection system 12, vortex tube 13, enrichment-thermal desorption device 14, gas supply and pressure control system 15. Injection tube 4 and heat tracing syst...

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 relates to an online enrichment system for gaseous and granular semi-volatile organic compounds. The system comprises a vaporizing chamber, an electromagnetic three-way valve, a first two-position six-way valve, a particulate trapping device, a primary trapping trap, a secondary focusing trap, a second two-position six-way valve, a first mass flow controller, a second mass flow controller, a gas pump, a gas chromatography-mass spectrometry detection system, an enrichment-thermal desorption device, a gas supply and pressure control system, a sample injection pipe and a heat tracing system. The system is simple in gas circuit; gaseous and granular SVOCs can be enriched on line and directly measured; the time resolution is 85 min; the gaseous and granular semi-volatile organic compounds are captured and measured on line; errors of a traditional indirect measurement and calculation method are avoided; the time resolution is high; energy consumption is low; the structure is compact; the device is small; operation is easy; the result is reliable; and the gaseous and granular semi-volatile organic compounds can be accurately measured on line.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, in particular to an online enrichment system, method and application of gaseous and granular semi-volatile organic compounds. Background technique [0002] In recent years, atmospheric environmental problems have become prominent, among which aerosol and ozone pollution are serious problems. Volatile organic compounds and semi-volatile organic compounds are not only important sources of secondary organic aerosols, but also important precursors for the formation of ozone. In addition to volatile organic compounds (Volatile Organic Compounds, VOCs), there are also semi-volatile organic compounds (Semi-organic Compounds, SVOCs) with larger molecular weight and more complex molecular structure. Semi-volatile organic compounds are an important class of environmental pollutants, especially for the formation of secondary organic aerosols (Secondary Organic Aerosol, SOA) in the atmospher...

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
IPC IPC(8): G01N30/08G01N30/20
CPCG01N30/08G01N30/20G01N2030/201
Inventor 陈仕意朱媛曾立民
Owner PEKING UNIV
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