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Method for detecting ethylene in gas by gas chromatography

A gas chromatography and gas detection technology, which is applied in the field of gas chromatography detection of ethylene in gas, can solve the problems of unstable results, combustion and explosion, and high detection limit, and achieves the effects of simple operation, lower detection limit, and high sensitivity

Active Publication Date: 2020-03-17
中维安全检测认证集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the ethylene content in a closed environment reaches a certain level, and there is a danger of combustion and explosion when exposed to heat or open flames.
At present, the detection method of ethylene in the air is mainly gas chromatography detection method. The existing gas chromatography detection method of ethylene has problems such as high detection limit, complicated operation and unstable results.

Method used

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  • Method for detecting ethylene in gas by gas chromatography
  • Method for detecting ethylene in gas by gas chromatography
  • Method for detecting ethylene in gas by gas chromatography

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A method for detecting ethylene in gas by gas chromatography, characterized in that: the steps are as follows:

[0034] (1) Use a glass syringe to collect the gas to be tested at the sampling site. The glass syringe should be cleaned at least three times with sample gas in advance. Immediately after sampling, the syringe should be sealed with an inert bee head and stored in a sample storage box until the sample is taken out for analysis. ;

[0035] (2) Take the sampling container injected with high-purity nitrogen to the sampling site, and send it back to the laboratory for analysis with the sample instruments collected in the same batch to verify whether there is pollution during transportation;

[0036] (3) Use a 100mL glass syringe as the container, dilute the ethylene standard gas step by step with high-purity nitrogen according to the volume ratio of 1:1, and configure a calibration series with at least 4 concentration gradients;

[0037] The calibration curve con...

Embodiment 2

[0063] A method for detecting ethylene in gas by gas chromatography, characterized in that: the steps are as follows:

[0064] (1) Use a glass syringe to collect the gas to be tested at the sampling site. The glass syringe should be cleaned at least three times with sample gas in advance. Immediately after sampling, the syringe should be sealed with an inert bee head and stored in a sample storage box until the sample is taken out for analysis. ;

[0065] (2) Take the sampling container injected with high-purity nitrogen to the sampling site, and send it back to the laboratory for analysis with the sample instruments collected in the same batch to verify whether there is pollution during transportation;

[0066] (3) Use a 100mL glass syringe as the container, dilute the ethylene standard gas step by step with high-purity nitrogen according to the volume ratio of 1:1, and configure a calibration series with at least 4 concentration gradients;

[0067] The calibration curve con...

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Abstract

The invention discloses a method for detecting ethylene in gas by gas chromatography, and belongs to the technical field of environmental gas detection. The method for detecting ethylene in gas by thegas chromatography comprises the steps of sample collection, drawing of a standard curve, gas chromatographic analysis and the like. The method for detecting ethylene by the gas chromatography is easy to operate and high in sensitivity, the precision of ethylene detection through the method is 0.24%, the accuracy is 104%, the detection limit is 0.07 ppm and the quantification limit is 0.21 ppm.

Description

technical field [0001] The invention belongs to the technical field of gas detection in the environment, and in particular relates to a method for detecting ethylene in gas by gas chromatography. Background technique [0002] Ethylene is the simplest olefin, molecular formula C 2 h 4 . Existing in a small amount in plants, it is a metabolite of plants, which can slow down plant growth and promote leaf fall and fruit ripening. Colorless flammable gas. Melting point -169°C, boiling point -103.7°C. Almost insoluble in water, hardly soluble in ethanol, easily soluble in ether and acetone. [0003] Ethylene is one of the volatile organic pollutants (VOCs), which is the most important factor causing air pollution and endangering human health in the indoor environment; ethylene is a low-toxicity substance with simple suffocation and strong anesthetic effect. Exposure may cause dizziness, fatigue, general malaise, and inability to concentrate. In addition, the ethylene conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/86
CPCG01N30/02G01N30/8679
Inventor 桑运普牛军舰孙斌丛明日高丽
Owner 中维安全检测认证集团有限公司
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