Changes in volatile flavor compounds in steam-dried Allium hookeri root

Area of Science:

• Food Chemistry
• Flavor Analysis
• Plant Biochemistry

Background:

• Allium hookeri root (AHR) is a potential source of unique flavor compounds.
• Understanding the volatile profile of AHR and its derivatives is crucial for culinary and industrial applications.

Purpose of the Study:

• To identify and quantify volatile flavor compounds in raw Allium hookeri root (AHR).
• To investigate the impact of steam-drying on the volatile profile of AHR.
• To characterize the changes in dominant volatile compounds with increased steam-drying duration.

Main Methods:

• Simultaneous steam distillation and extraction (SDE) for volatile compound isolation.
• Gas chromatography/mass spectrometry (GC/MS) for identification and quantification.
• Comparative analysis of volatile profiles in AHR and steam-dried AHR.

Main Results:

• Forty volatile compounds were identified in AHR, with sulfur-containing compounds (96.8%) being dominant.
• Steam-dried AHR showed a decrease in total volatile compounds (5.96 mg/kg for 2x, 4.23 mg/kg for 4x).
• Sulfur compounds decreased, while aldehydes increased significantly with prolonged steam-drying.

Conclusions:

• The volatile flavor profile of Allium hookeri root is significantly altered by steam-drying.
• Increased steam-drying time leads to a reduction in sulfur compounds and a rise in aldehydes.
• This study provides the first comprehensive report on the volatile compounds of AHR and its steam-dried forms.