Two-section type gas sampling tube as well as preparation method and application thereof

A gas sampling tube and two-stage technology are applied in the field of two-stage gas sampling tube and its preparation, which can solve the problem that the adsorption effect needs to be improved, and achieve the effect of improving the accuracy of qualitative and quantitative and good adsorption.

Pending Publication Date: 2021-06-18
JINAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the adsorption effect of Tenax-TA tubes on volatile organic

Method used

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  • Two-section type gas sampling tube as well as preparation method and application thereof
  • Two-section type gas sampling tube as well as preparation method and application thereof
  • Two-section type gas sampling tube as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Example 1 Two-stage gas sampling tube and its preparation

[0034] Such as figure 1 As shown, a two-stage gas sampling tube includes an adsorption tube, the inlet end of the adsorption tube has a groove, and the gas outlet end is straight; the adsorption tube is sequentially arranged or filled with first copper mesh , the first glass wool, Tenax TA adsorbent filler, the second glass wool, Carboxen 1000 carbon molecular sieve filler, the third glass wool and the second copper mesh; the copper mesh is the interlayer of the filler, used to fix the adsorbent in the adsorption tube Packing, glass wool is used to prevent the adsorbent from falling out of the tube. The preparation process of the two-stage gas sampling tube is as follows: fill the above material from the gas outlet end into the adsorption tube, first add a piece of copper mesh with a suitable size to the bottom of the filling tube to fix the adsorbent in the gas sampling tube, and then add an appropriate amoun...

Embodiment 2

[0035] The preparation of embodiment 2 two-section gas sampling pipe

[0036] Only the mass of Tenax TA adsorbent in Example 1 was modified to 0.3 g, the mass of Carboxen 1000 carbon molecular sieve was modified to 0.15 g, and the rest of the conditions remained unchanged, and a two-stage gas sampling tube was prepared.

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Abstract

The invention provides a two-section type gas sampling tube as well as a preparation method and application thereof. Tenax TA and a Carboxen 1000 carbon molecular sieve are selected as adsorbents to prepare the two-section type gas sampling tube, and the preparation method comprises the following steps: adding a copper net into a hollow tube of an adsorption tube, then adding glass wool, adding a Tenax TA adsorbent, adding glass wool for separation, then adding a Carboxen 1000 carbon molecular sieve, and finally adding glass wool and a copper net in sequence to fix the adsorbents in the tube, so as to obtain a finished product, wherein Tenax TA has relatively good adsorption performance on VOCs (Volatile Organic Compounds) with six or more carbon atoms. The Carboxen 1000 carbon molecular sieve has good adsorbability on VOCs with six or less carbon atoms, and the Carboxen 1000 carbon molecular sieve and the Tenax TA are combined for application, so that various volatile organic compounds released by plastics can be better collected, and the accuracy of qualitative and quantitative analysis of VOCs is improved.

Description

technical field [0001] The invention relates to the technical field of analysis and testing methods, in particular to a two-stage gas sampling tube and its preparation method and application. Background technique [0002] Plastic is almost ubiquitous in our lives and is used in large quantities due to its light weight, ease of manufacture and molding, and its ability to meet various application needs. my country is a big country in the manufacture and use of plastics, and the pollution problems caused by the extensive use of plastics have gradually attracted widespread attention. A large amount of waste plastics will bring huge pressure to the ecological environment. Not only the plastic itself will pollute the environment, but also the plastic waste exposed to the environment will undergo photodegradation under the action of sunlight, and continuously release harmful volatile organic compounds. (VOCs). These VOCs are important precursors of atmospheric compound pollution,...

Claims

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Application Information

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IPC IPC(8): G01N30/16
CPCG01N30/16
Inventor 江瑞芬吴仲书吴欣妍
Owner JINAN UNIVERSITY
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