Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Low-temperature pressurization head space sample injection device for measuring volatile substances in atmosphere through GC-MS (gas chromatography-mass spectrometer) technology

A GC-MS and volatile substance technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of analysis result error, poor reproducibility, large error, etc., and achieve the effect of improving sensitivity, not easy to evaporate, and reducing interference

Active Publication Date: 2014-02-05
SHANGHAI RES INST OF CHEM IND +1
View PDF2 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem in the collection of volatile substances in the atmosphere is that the temperature difference and pressure difference between the inside and outside of the sampling tube can cause the volatilization and loss of the sample, and the compound cannot be analyzed correctly, which brings great errors and poor reproducibility to the analysis results.
In order to solve the above-mentioned problems of large sampling errors and poor reproducibility, this patent invents a low-temperature pressurized headspace sampling device

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
  • Low-temperature pressurization head space sample injection device for measuring volatile substances in atmosphere through GC-MS (gas chromatography-mass spectrometer) technology
  • Low-temperature pressurization head space sample injection device for measuring volatile substances in atmosphere through GC-MS (gas chromatography-mass spectrometer) technology
  • Low-temperature pressurization head space sample injection device for measuring volatile substances in atmosphere through GC-MS (gas chromatography-mass spectrometer) technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0026] Such as Figure 1-5 As shown, a low-temperature pressurized headspace sampling device for GC-MS determination of volatile substances in the atmosphere includes:

[0027] The reciprocating all-glass piston pump consists of a glass piston cylinder 1, a one-way valve a2, a one-way valve b3, a clamping clip 4, a crank linkage mechanism 5, a micro motor 6, and a worm reducer 7, and the glass piston cylinder One end of cylinder 1 is provided with parallel one-way valve a2 and one-way valve b3, and the piston at the other end is sequentially connected to crank linkage mechanism 5, worm reducer 7, and micro motor 6 through clamping clip 4, and said one-way valve a2 is connected to Sampling tube 13;

[0028] The headspace bottle for sampling includes the headspace bottle 10. The headspace bottle is provided with a seal, and two injection needles, one long and one short, are inserted into the seal, wherein the long needle touches the bottom as the inlet needle 8, and the short n...

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 a low-temperature pressurization head space sample injection device for measuring volatile substances in the atmosphere through a GC-MS (gas chromatography-mass spectrometer) technology. The low-temperature pressurization head space sample injection device comprises a reciprocating full-glass piston pump which consists of a glass piston cylinder barrel (1), a unidirectional valve a (2), a unidirectional valve b (3), a clamp (4), a crank-link mechanism (5), a micro motor (6) and a worm speed reducer (7), a sampling head space bottle which comprises a head space bottle body (10) and cooling equipment, wherein a seal is arranged at the head space bottle; two injection needle heads with different lengths are inserted into the seal; the long needle head is in contact with the bottom to serve as a gas inlet needle (8); the short needle head is positioned at a bottleneck to serve as a gas exhaust needle (9); the gas inlet needle (8) is connected with the unidirectional valve b (3); the gas exhaust needle (9) is connected to a GC-MS; the head space bottle body (10) is arranged in the cooling equipment (12). Compared with the prior art, the low-temperature pressurization head space sample injection device has the advantages that the efficiency of collecting the volatile components in the atmosphere can be improved, so that the volatile components in the atmosphere can be fully collected and can be subjected to quantitative and qualitative compound analysis in the GC-MS.

Description

technical field [0001] The invention relates to a sampling device, in particular to a low-temperature pressurized headspace sampling device for GC-MS determination of volatile substances in the atmosphere. Background technique [0002] Gas chromatography-mass spectrometry (GC-MS) is the abbreviation of gas chromatography-mass spectrometry (GC-MS), which is a technology that combines gas chromatography (GC) and mass spectrometer (MS) through an appropriate interface, and uses computer technology to perform joint analysis. GC-MS is the most mature two-spectrum coupling technique. GC-MS is widely used in the separation and identification of complex components. It has the high resolution of GC and the high sensitivity of MS. It is suitable for the analysis of low molecular weight compounds (molecular weight <1000), especially for the analysis of volatile components. Volatile organic compounds (VOCs) are an important class of air pollutants, usually referring to organic compo...

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): G01N30/16
Inventor 徐大刚张小沁王露薛晓康
Owner SHANGHAI RES INST OF CHEM IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products