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A method for detecting carbon dioxide content in air

A carbon dioxide and detection method technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of high cost and inappropriateness, and achieve the effect of reducing detection cost and reducing cost

Active Publication Date: 2019-04-02
LABOUR SAFETY TECH RES CENT HEILONGJIANG PROV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high cost of this chromatographic instrument is not suitable for use in China. Therefore, it is very meaningful to explore a chromatographic detection method suitable for domestic applications in China

Method used

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  • A method for detecting carbon dioxide content in air
  • A method for detecting carbon dioxide content in air
  • A method for detecting carbon dioxide content in air

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Determination of carbon dioxide content in the outdoor atmosphere:

[0089] 1. Experimental equipment: carbon dioxide content: 588mg / m 3 、1 176mg / m 3 、2 352 mg / m 3 , 4704mg / m 3 Standard gas, high-purity helium, 60 / 80 mesh silica gel, 500ml aluminum foil sampling bag, flat six-way valve with 3ml gas quantitative tube, SP2100 gas chromatograph, TCD, chromatography workstation N2000 type;

[0090] 2. Sampling: In an open outdoor space where there are no motor vehicle activities, within the breathing zone of a person's standing posture, repeatedly squeeze the medical double ball to inflate the aluminum foil sampling bag to about 80% of the volume of the gas sampling bag. Then remove the double ball from the gas collection bag, squeeze and get rid of the gas collected in the gas collection bag, and repeat three times. Finally, use the double ball to collect gas to about 80% of the volume of the sampling bag, and use the sealing valve of the sampling bag to seal the sampl...

Embodiment 2

[0100] Determination of carbon dioxide content in indoor atmosphere:

[0101] 1. Experimental equipment: carbon dioxide content: 588mg / m 3 、1 176mg / m 3 、2 352 mg / m 3 、4 707mg / m 3Standard gas, high-purity helium, 60 / 80 mesh silica gel, 500ml aluminum foil sampling bag, flat six-way valve with 3ml gas quantitative tube, SP2100 gas chromatograph, TCD, chromatography workstation N2000 type;

[0102] 2. Sampling: at 30m 2 In the laboratory, after 3 people work for 6 hours, they are located in the range of the breathing zone of the sitting posture of the person, and repeatedly squeeze the medical double ball to inflate the aluminum foil sampling bag to about 80% of the volume of the gas sampling bag. Then remove the double ball from the gas collection bag, squeeze and get rid of the gas collected in the gas collection bag, and repeat three times. Finally, use the double ball to collect gas to about 80% of the volume of the sampling bag, and use the sealing valve of the sampling...

Embodiment 3

[0112] Determination of carbon dioxide content in train soft sleeper compartments:

[0113] 1. Experimental equipment: carbon dioxide content: 4704mg / m 3 , 9408mg / m 3 , 18816mg / m 3 , 35280mg / m 3 Standard gas, high-purity helium, 60 / 80 mesh silica gel, 500ml aluminum foil sampling bag, flat six-way valve with 3ml gas quantitative tube, SP2100 gas chromatograph, TCD, chromatography workstation N2000;

[0114] 2. Sampling: After driving for 4 hours in a soft sleeper car with 4 seats, within the breathing zone of the person's sitting posture, repeatedly squeeze the medical double ball to inflate the aluminum foil sampling bag to about 80% of the volume of the air sampling bag. Then remove the double ball from the gas collection bag, squeeze and get rid of the gas collected in the gas collection bag, and repeat three times. Finally, use the double ball to collect gas to about 80% of the volume of the sampling bag, and use the sealing valve of the sampling bag to seal the sampli...

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Abstract

The invention discloses a method for detecting the content of carbon dioxide in the air. The method comprises the following steps of collecting mixed gas containing carbon dioxide in a monitoring region; separating the carbon dioxide from the mixed gas containing carbon dioxide; performing detection on the separated carbon dioxide to obtain detection data; collecting and processing the detection data; obtaining the carbon dioxide content of the mixed gas containing carbon dioxide in the monitoring region. The method has the advantages that the detection sensitivity is high; the detection data can be remained for a long time; the detection source tracing requirements of a laboratory can be met.

Description

technical field [0001] The invention relates to the technical field of detecting gas content by chromatography. More specifically, it relates to a method for detecting carbon dioxide content in air. Background technique [0002] The measurement of carbon dioxide is a common evaluation index for occupational health and public place health conditions, and it is also used for the detection of emergency rescue sites for hypoxia and suffocation accidents. [0003] At present, the non-spectral infrared carbon dioxide direct reading measuring instrument is used in China. The principle of this method is to use carbon dioxide to selectively absorb infrared rays of specific wavelengths. Within a certain range, the absorption value has a linear relationship with the carbon dioxide concentration. Determine the concentration of carbon dioxide in the sample from the absorbance value. In actual work, it is found that the water vapor at the measurement site interferes with the measureme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/66
CPCG01N30/02G01N30/66
Inventor 于静吕天玲张渊刘思海岳强
Owner LABOUR SAFETY TECH RES CENT HEILONGJIANG PROV