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- W2938902736 abstract "Thermal desorption aerosol gas chromatography (TAG) is an effective tool for in situ analysis of particulate organic molecules. However, the performance of current TAG is limited by the detectability of low volatile compounds and the matrix effect. In this study, a dual-trap TAG system was developed to address these issues. Thermally desorbed effluent is focused by a weakly retained trap (for low volatile compounds) in a 1 m capillary column conditioned in the GC oven, followed by a strongly retained trap (for high volatile compounds). Then, the focused analytes are desorbed in a reverse flow into the GC column for analysis. Detection over a wide volatility range from C10 to C40 n-alkanes is achieved using the dual-trap TAG. We show that it has lower discrimination of injection, better linearity and higher detectability of n-alkanes. The dual-trap TAG was applied for in-situ measurement of ambient fine particles (PM2.5) in Beijing. Repeatable retention time of n-alkanes was demonstrated during a continuous measurement over two weeks." @default.
- W2938902736 created "2019-04-25" @default.
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- W2938902736 date "2019-08-01" @default.
- W2938902736 modified "2023-10-16" @default.
- W2938902736 title "Improving thermal desorption aerosol gas chromatography using a dual-trap design" @default.
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- W2938902736 doi "https://doi.org/10.1016/j.chroma.2019.04.045" @default.
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