Accelerated solid-phase dynamic extraction for the analysis of biogenic volatile organic compounds in air

摘要

In this study, accelerated solid phase dynamic extraction (ASPDE) technique was used to identify biogenic volatile organic compounds (BVOCs) emitted from Norway spruce (Picea abies). Compounds that were determined in tree samples are: tricycylene, α-pinene, camphene, β-pinene, myrcene, 3-carene, p-cymgne, limonene, cineole, α-phellandrene, α-terpinene, γ-terpinene and terpinolene. ASPDE showed a potential for the analysis of environmental samples as well as for field applications. This technique was further studied by using a gaseous mixture of BVOCs (sabinene, a-pinene, β-pinene, limonene, linalool, and (Z)-hexenyl acetate) and exhibited a good repeatability during all the experiments in the range of 2.5% (a-pinene) and 14.6% (linalool). However, during the analysis of samples it was observed that desorption at high temperature (230℃) can lead to the formation of artifacts, which were not observed at the desorption temperature of 100℃. Further experimental investigations revealed that monoterpenes appeared as unanticipated compounds during desorption of ASPDE samples; these compounds were degradation products of linalool.