译 名：
Selection of adsorbent and optimization of adsorption performance in VOCs sampling of wood-based panel
作 者：
MA Junhong;LU Zhigang;SHEN Jun;Material Science and Engineering College, Northeast Forestry University;Nanjing Customs Industrial Products Testing Center;
关键词：
wood based panel;;VOCs;;adsorbent;;sample parameters;;penetration rate
摘 要：
The performance of adsorbents plays an important role in the detection of volatile organic compounds(VOCs) from wood-based panels. In this study, five adsorbents were selected to detect and analyze 73 organic compounds, including aromatic hydrocarbons, terpenes, alkanes, esters, aromatic alcohols, and fatty alcohols. With the chromatographic retention area of the secondary target monomers of the sample tube accounting for 3% of the chromatographic retention area of the total primary and secondary target monomers, the penetration index was set, and the appropriate sampling flow and sampling volume of the adsorbent were determined to optimize the adsorption performance. In the test, the adsorption tube was aged firstly, and the standard mixed solution was prepared. The two adsorption tubes were connected in series with high purity nitrogen and atmospheric sampler, respectively. The prepared standard mixed solution was captured in the adsorption tube through the appropriate sampling flow and sampling time, and then the adsorption tube was detected and analyzed by ATD-GC/MS. Finally, the penetration rate of the adsorption tube was calculated. The results showed that no significant penetration of C_6-C_(16) monomers was observed except for benzene, 3-methylpentane, n-hexane, cyclohexane, methyl cyclohexane, α, β-pinene and camphene, when Tenax TA was used as an adsorbent, with a sampling mass of 2 000 ng, a sampling flow rate of 150 mL/min and a sampling volume of 9 L. The mixed adsorbents of Carbosieve~(TM)S-Ⅲ and Carbopack B were used. The sampling mass was 2000 ng, the sampling flow was 150 mL/min, and the sampling volume was 15 L. No obvious penetration of C_3-C_(16) monomers was observed. No obvious penetration of C_3-C_(16) organic compounds except for benzyl alcohol, 2-ethyl-1-hexanol and butyl hydroxy toluene was observed when the activated carbon adsorbent was used. When Carbosieve~(TM)S-Ⅲ and Carbotrap B were used as adsorbents alone, multiple penetrations occurred in the monomer detection. In comparison, Carbosieve~(TM)S-Ⅲ and Carbopack B had the best adsorption performance. Mixed sorbents can provide ideal alternating adsorption characteristics. It is suggested exploring the mixed sorbents in the future, expanding their detection range of volatile organic compounds, and further evaluating the rationality and reliability of their application. Since the selection and optimization of adsorption performance in VOCs sampling is the premise and key to guarantee the quality of VOCs detection, research in this field would attract more scientists' attention in the future, and new materials with better performance would emerge constantly.
