Comprehensive two-dimensional gas chromatography for fingerprint pattern recognition in cachaça production

Area of Science:

• Food Chemistry
• Analytical Chemistry
• Metabolomics

Background:

• Cachaça quality is influenced by fermentation, distillation, and aging processes.
• Characterizing aroma compounds is crucial for quality control and understanding flavor profiles.
• Advanced analytical techniques are needed for detailed analysis of complex matrices like cachaça.

Purpose of the Study:

• To develop and apply a GCxGC/TOFMS method for analyzing cachaça aroma compounds.
• To monitor the fermentation and distillation processes of cachaça.
• To characterize the impact of different wood materials on cachaça during aging.

Main Methods:

• Comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometry (GCxGC/TOFMS).
• Headspace-solid phase microextraction (HS-SPME) with a polyacrylate fiber for aroma extraction.
• Visual and retention time comparison of GCxGC contour plots for sample analysis.

Main Results:

• GCxGC/TOFMS fingerprinting enabled effective monitoring of cachaça distillation, distinguishing head, core, and tail fractions.
• The aging process in different wood types was successfully characterized by analyzing aroma compound profiles.
• Visual analysis of contour plots allowed identification of wood types and aging effects without complex statistical analysis.

Conclusions:

• GCxGC/TOFMS provides a powerful tool for cachaça quality control and process monitoring.
• The method facilitates the identification of key aroma compounds differentiating distillation stages and aging treatments.
• This approach offers a rapid and effective way to assess cachaça authenticity and aging characteristics.