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

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,...

AI Technical Summary

Problems solved by technology

However, the adsorption effect of Tenax-TA tubes on volatile organic compounds with less than six carbon atoms still needs to be improved

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