The American cranberry (Vaccinium macrocarpon Aiton) is widely appreciated for its high nutritional value and characteristic volatile profile, making it an important raw material for the food industry, particularly in the sector of minimally processed products. However, thermal processing may significantly alter its volatile composition, leading to aroma losses and degradation of product quality. Therefore, understanding the impact of processing conditions on aroma stability is essential for developing new post-harvest technologies that preserve the volatile profiles of processed fruit products. The aim of this study was to evaluate the effect of thermal treatment and protein matrix modification on the volatile organic compound (VOC) profile of fresh-cut cranberry fruit. Samples were heated at 50, 100, and 200 °C, with and without gelatin addition as a protein-based matrix modifier. VOCs were analysed using headspace solid-phase microextraction coupled with gas chromatography–mass spectrometry (HS-SPME–GC–MS). High-temperature treatment (200 °C) resulted in substantial changes in the volatile composition of the reference cranberry fruit and contributed to the complete loss of characteristic native terpenoids. The addition of gelatin significantly improved the retention of hydrophobic volatiles under thermal stress, maintaining D-limonene at 20.3% of the total volatile fraction, whereas this compound was absent in samples processed without the modifier. Furthermore, gelatin successfully altered the course of thermally induced reactions, reducing undesirable furfural formation from 23.95% to 7.28%. These changes indicate that protein-assisted matrix modification can effectively limit aroma degradation and preserve the volatile profile during thermal processing. The findings demonstrate the potential of this approach as a novel technological strategy for enhancing aroma stability, reducing processing-related quality losses, and supporting the development of fresh-cut cranberry products with enhanced volatile compound retention.
Balawejder et al. (Fri,) studied this question.