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Sample-taking adsorption tube and its hydrolyzed adsorption device

An adsorption tube and thermal desorption technology, applied in chemical instruments and methods, dispersed particle separation, separation methods, etc., to achieve the effects of wide application range, simple structure, and narrow sampling band

Inactive Publication Date: 2006-07-19
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inner wall of the sampling adsorption tube is inertized

Method used

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  • Sample-taking adsorption tube and its hydrolyzed adsorption device
  • Sample-taking adsorption tube and its hydrolyzed adsorption device
  • Sample-taking adsorption tube and its hydrolyzed adsorption device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: the mensuration of benzene homologue

[0017] Heat the thermal desorber to 280-300°C, press the mixed gas sample with a concentration of 10 μg / L benzene homologues into the sampling adsorption tube through the syringe, close the desorption gas stop valve, and place the sampling adsorption tube in the thermal desorber to heat for 5 minutes , Open the desorption gas shut-off valve for rapid desorption, so that the desorbed sample quickly enters the column head of the gas chromatographic analysis column at 40 ° C for focusing in a short time, and the gas chromatograph is started for analysis. For analysis results, see Figure 4 .

Embodiment 2

[0018] Embodiment 2: Determination of low boiling point components in atmospheric samples

[0019] The atmospheric sample is sucked into the sampling adsorption tube through the syringe, and the rest are described in Example 1.

Embodiment 3

[0020] Embodiment 3: Analysis and determination of low boiling point components in liquor sample

[0021] Press the head air of the wine sample into the sampling adsorption tube through the syringe, and the rest are the same as in Example 1.

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PUM

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Abstract

The invention discloses a sampling adsorption pipe and heat desorber, wherein the sampling adsorption pipe is composed of reducing steel pipe with middle displaying thick diameter pipe; the adsorbent is filled with the thick diameter pipe with glass or quartz hair filling with two ends of adsorbent; two ends of sampling adsorption pipe is thin diameter pipe separately; one end of thin diameter pipe is an outlet pipe, which connects the thick diameter pipe stickly; the other end of thin diameter pipe is inlet pipe, which connects the thick diameter pipe through cap; the heat desorber is a metal block of internal heating bar with a cavity in the middle of metal block to contain the sampling adsorption pipe; the other end of heat desorber contains groove position to allocate the sampling adsorption pipe; when desorbed, the heat desorber is heated to preset temperature, which contains the thick diameter pipe of sampling adsorption pipe in the cavity to heat; the nut is inserted in the groove position of heat desorber, which takes the desorbed sample in the gas chromatograph analysis column.

Description

technical field [0001] The invention relates to an adsorption tube and thermal desorption device for enriching low-boiling point gas samples. The gas adsorption tube is mainly used for on-site sampling and is easy to carry. The design of the thermal desorption device is simple, and the injection band is compressed by combining the instant sample injection technology and the stationary phase focusing technology. Background technique [0002] Air pollution will directly affect people's health. Therefore, in order to protect human health and control air pollution, it is necessary to monitor and evaluate air quality, especially indoors. At present, most of the methods used are the adsorption tube enrichment method for the analysis and determination of organic pollutants in the air. The sampling adsorption tube is filled with a certain volume of adsorbent. When sampling, the sample passes through the adsorption tube under the action of the sampling pump, and the pollutants are a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04
Inventor 关亚风刘文民徐媛赵景红
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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