Prepn process and apparatus of extracting fiber for solid phase micro extractor

Abstract

The present invention discloses preparation process and apparatus of extracting fiber for solid phase micro extractor. After the extracting fiber is set on the stainless steel net as negative pole of plasma generator and the conducting rod is connected to the positive pole, voltage of 8-20 kV is applied, and the extracting fiber is plasma treated inside the plasma generator for 1-150 min to obtain etched surface and generate some radicals, such as hydroxyl radical, carbonyl radical, etc. The plasma treated extracting fiber with very high adsorbing capacity is cut into small section of 10-12 mm length and used in the extracting head of solid phase micro extractor. The extracting fiber preparing process has facile material, low cost, simple operation and short period, and the prepared extracting fiber has high adsorbing efficiency.

Description

technical field [0001] The invention relates to a preparation method and device of an extraction fiber of a solid-phase micro-extractor. Background technique [0002] Commercial extraction fibers such as PDMS, PA, etc. have high cost, small adsorption capacity, and short service life, and the scope of application is limited due to the fact that most of them use similar-miscible as the extraction principle. At present, domestic research on the preparation of extraction fibers for solid-phase microextractors uses carbonization, activation, and acid-base solution treatment, or bonding composite coatings on the surface of quartz fibers, or using carbon matrix, inorganic binders and other materials After high pressure, high temperature and solution immersion and other processes. The raw materials are complex and diverse, the process is cumbersome and time-consuming, and the adsorption capacity of the extracted fibers produced is not large. Contents of the invention [0003] I...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of complex raw materials, cumbersome and time-consuming process, and small adsorption capacity in the existing extraction fiber production process, the purpose of the present invention is to provide a method and device for preparing extraction fibers using a plasma-treated solid-phase microextractor, and Production of extraction fibers that have good adsorption effects on trace gases, polar and non-polar organic and inorganic gases

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