Abstract

Platycodon grandiflorum (Jacq.) A. DC. (PG) is an edible and medicinal plant. This study aimed to investigate the potential of electron beam (EB) irradiation for preserving PG. EB Irradiation at doses of 2-8 kGy were applied to PG, and the effects on microbial content, sensory qualities, chemical qualities, and EB penetration were examined. Results showed that irradiation with 6 kGy effectively maintained PG's microbiological quality of PG when packing thickness was ≤ 6.3cm during a 360-day storage period. The physicochemical properties, color, active ingredient contents, and antioxidant capacities of PG remained unaffected. However, total flavonoid and Platycodin-D content exhibited a non-dose-dependent alteration. The use of electronic nose analysis successfully differentiated the odor of EB irradiated PG samples from non-irradiated ones. Fingerprint analysis also indicated no significant impact of EB irradiation on PG quality. These findings suggest that EB treatment could be a valuable approach for extending the shelf life of PG.

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