Study On New Thermal Desorption Agent For Benzene Detection

Volatile organic compounds (VOCs) pollution has become one of the main problems of environmental pollution. Thermal desorption is widely used in the analysis of VOCs pollution. Now, many experts and scholars have pay attention to thermal desorber is used at volatile organic compounds (VOCs) sampling and pre-treatment, etc.. And ignore the important effects of adsorption packing. This work is mainly invovlved with study working on several types of adsorption packing. The target of the thesis is to develop new one with high-performance.The preservation effect of sample, the rate of residual sample, adsorption volume, repeatable, etc. are walways important reference indexs of the thermal desorption filler. Tanex-TA is the current mainstream thermal desorption analysis options. The material has low background, poor affinity to water;but has small specific surface area, long renew time, and after repeated use, will cause adsorption packing too tiny to flow distortion.In chapter two, using the compound adsorption material (Tanex-TA tube), which is widely used of benzene (BTEX) adsorption test, and optimization test method.In chapter three and four, an analytical method for BTEX using new adsorption packing. Through repeatability test, linear test, residual test, we find C18 has outstanding performance. Can be used as a candidate material for further optimization of novel adsorption filler.This paper is to study the new adsorbent fillers for the key, this product will provide for the analysis and determination of future air sample effectively carrier.