Volatile composition of pomegranates from 9 Spanish cultivars using headspace solid phase microextraction.

Area of Science:

• Food Science
• Analytical Chemistry
• Sensory Science

Background:

• Pomegranate juice quality is influenced by cultivar-specific volatile compounds and sensory profiles.
• Understanding the relationship between volatile composition and consumer preference is crucial for juice production.

Purpose of the Study:

• To analyze the quality parameters, volatile composition, and sensory profiles of nine Spanish pomegranate cultivars.
• To identify key volatile compounds influencing consumer liking of pomegranate juice.
• To explore the potential of sour-sweet cultivars for improving pomegranate juice quality.

Main Methods:

• Volatile compounds extracted using headspace solid phase micro-extraction (HS-SPME).
• Analysis performed by gas chromatography-mass spectrometry (GC-MS) and flame ionization detector (GC-FID).
• Sensory evaluation conducted by a consumer panel.

Main Results:

• Twenty-one volatile compounds identified, including aldehydes, monoterpenes, and alcohols.
• Hexanal, limonene, trans-2-hexenal, and cis-3-hexenol were the most abundant volatiles.
• Cultivars Mollar Elche (ME) ME14, ME1, and ME2 received highest consumer liking, despite lower volatile concentrations.
• Consumer liking correlated positively with monoterpenes (e.g., α-terpineol) and negatively with aldehydes (e.g., trans-2-hexenal).

Conclusions:

• Sour-sweet pomegranate cultivars (PTO7, ADO4) possess desirable traits like intense color and high monoterpene content.
• Incorporating sour-sweet cultivars can enhance the sensory quality and volatile profile of pomegranate juices.
• This study provides practical insights for improving commercial pomegranate juice production through cultivar selection.