Determination of Droplet-Bound and Free Gas-Phase Fragrances Using a Filter-Incorporated Needle-Trap Device and Solid-Phase Microextraction Technologies

Abstract

Some of the fragrance compounds in aerosols tend to remain trapped inside the droplets. The ability to capture these droplets would make it possible to desorb and transfer the analytes dissolved within for determination. In this study, we design a novel filter-incorporated needle-trap device and use it to capture fragrance compounds in droplets as well as the gas phase of seven aerosol spray samples. For comparison, thin-film and solid-phase microextraction were also employed to extract gas-phase-borne fragrances from the same sprays. The results revealed that the filter-incorporated needle-trap device enables the extraction of total concentrations due to its ability to trap fragrance-containing droplets, whereas thin-film and solid-phase microextraction are only able to extract unbound compounds present in the gas phase. In addition, the developed needle-trap device provided acceptable results, proving its applicability for the analysis of aroma in other samples, such as beer and soda.

Green Portable Method for Simultaneous Investigation of Gaseous and Particle-Bound Air Pollutants in Indoor and Outdoor Environments

“…During previous applications of filter-incorporated NTDs, the device could be reused multiple times when the aerosol sample includes liquid droplets. , In this study, however, the flow rate of the NTD began to decrease after multiple extractions from dirty samples with large particles, such as incense smoke. This issue can be attributed to the different fate of droplets and particles during desorption, as liquid droplets trapped in the filter can be vaporized during the thermal desorption.…”