The shelf-life of total polyphenol content and the antioxidant capacity of the Polygonum multiflorum (Thunb.) root extract and its spray dried powder according to the Q₁₀ method

Abstract

The main purpose of this research was to investigate the accelerated shelf-life of phenolic compounds in Polygonum multiflorum (Thunb.) root extract and its spray dried products at various temperatures. Using the Q₁₀ model helped in observing the degradation of the total polyphenol content (TPC) and antioxidant capacity (AC) of the product, while enabling an accurate prediction of the its shelf-life at different storage temperatures. The results showed that the degradation of TPC and AC of the extract was rapid at elevated temperatures. The spray-dried products maintained TPC and AC better than the extract. TPC and AC retention of 85% of the extract were approximately 42.4 and 5.1 days at 30°C, respectively. While TPC and AC retention of 85% of gum arabic were 6.2 and 13.1 days, TPC and AC retention of 85% of maltodextrin (DE 16-19) were 14.68 and 7.16 days, respectively. The obtained model was reliable and easy to use.