Determination of Ethanol in Flavor Microcapsules by Ultrasound Assisted Total Vaporization Headspace – Gas Chromatography (TV HS-GC)

Abstract

Total vaporization (TV) headspace (HS) gas chromatography (GC) is reported for the determination of ethanol in flavor oil microcapsules. Fifteen microliters of sample were placed in a headspace sample vial and a near-complete mass transfer of ethanol from the liquid phase to the vapor phase was obtained within one minute at 105 °C. This approach allowed the determination of ethanol in the sample by gas chromatography. Under the optimal conditions, the performance of this method was investigated, showing good linearity and a low limit of quantification equal to 8.95 mg/L. The relative standard deviation was less than 3.3%, and the recovery ranged from 95.4% to 101.3%. The method was efficient, accurate, and suitable for the quality control determination of ethanol in oil phase systems.

Keywords:

• Ethanol
• flavor microcapsules
• gas chromatography (GC)
• headspace (HS)
• ultrasound-assisted total vaporization headspace gas chromatography (TV HS-GC)

Acknowledgments

The authors acknowledge the financial support from the Natural Science Foundation of Guizhou Minzu University (GZMZ2019YB06) and the Natural Science Foundation of Guizhou Education Commission (2022187).

Conflicts of interest

The authors declare no conflicts of interest.