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

Equipment for detecting sample gas and method for detecting sample gas by flame ionization detector

A flame ionization and detector technology, which is applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problems of sensitivity difference, detection result deviation, sensitivity change, etc., and achieve the effect of reducing interference

Pending Publication Date: 2019-07-09
THERMO FISHER SCI SHANGHAI INSTR CO LTD
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, when the hydrogen flame ionization detector for gas chromatography is applied to sample gas detection in the atmosphere or in places where the oxygen concentration is uncertain, the sensitivity will vary due to the oxygen content in the sample gas.
In addition, the degree of ionization of functional groups by flame combustion will also cause differences in sensitivity, resulting in deviations in the final test results
For example, it has been found in experiments that due to the presence of oxygen in the sample gas, the measurement deviation may be as high as 3%-20% of full scale, but obviously such deviation is not acceptable in this field

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
  • Equipment for detecting sample gas and method for detecting sample gas by flame ionization detector
  • Equipment for detecting sample gas and method for detecting sample gas by flame ionization detector
  • Equipment for detecting sample gas and method for detecting sample gas by flame ionization detector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The invention mainly relates to a device for detecting sample gas. The device includes a flame ionization detector to detect and analyze chemical components such as volatile organic compounds in the sample gas. The device of the present invention is particularly suitable for sample gases containing a certain amount of oxygen, such as sample gases collected directly from air or exhaust from other aerobic environments.

[0026] As mentioned above, when the sample gas contains oxygen, the sensitivity will change due to the different oxygen content in the sample gas, and the degree of ionization of the functional group by flame combustion will also cause a difference in sensitivity, resulting in The deviation of the final test result.

[0027] The flame ionization detector 100 referred to herein is, for example, a hydrogen flame ionization detector. This type of flame ionization detector uses hydrogen as the combustion gas. Preferably, air is also fed into the flame ioni...

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 equipment for detecting sample gas. The equipment comprises a flame ionization detector, wherein the flame ionization detector comprises a sample gas inlet, a combustible gasinlet and a combustion-aid gas inlet; in the flame ionization detector, sample gas flowing into the flame ionization detector is ionized under the action of a flame generated by combustible gas and combustion-aid gas, so as to generate a signal for chemically analyzing the sample gas; the equipment also comprises a compensation gas supply device to provide compensation gas to the flame ionizationdetector, so as to eliminate or relieve the disturbance caused by oxygen in the sample gas; and the compensation gas is oxygen-containing gas. The invention further provides a method for detecting thesample gas by the flame ionization detector. By the equipment and the method, the problem of disturbance of the oxygen in the oxygen-containing sample gas to a detection result can be solved.

Description

technical field [0001] The invention relates to a device for detecting sample gas, which includes a flame ionization detector. In addition, the present invention also relates to a method for detecting sample gas by means of a flame ionization detector, wherein the sample gas to be detected usually contains oxygen components. Background technique [0002] Gas chromatography analysis is one of the important modern analysis methods. On the one hand, it has the characteristics of high separation efficiency, fast analysis speed, accurate quantitative results, and easy automation. On the other hand, when it is combined with a mass spectrometer, computer, etc. for gas-mass coupling analysis, it can perform qualitative and quantitative analysis of complex multi-component mixtures. Therefore, gas chromatographic analysis instruments are increasingly widely used in petrochemical, pharmaceutical, biochemical, environmental science and other fields, and become an indispensable and imp...

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): G01N30/68G01N30/32
CPCG01N30/68G01N30/32G01N2030/324
Inventor 张健国洪德裕黄于珉何江涛吕洋
Owner THERMO FISHER SCI SHANGHAI INSTR CO LTD
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