Effects of mixing ratio and pasteurization on the quality of a beverage made from Pouzolzia zeylanica extract and passion fruit (Passiflora edulis Sims.) juice
Nội dung chính của bài viết
Tóm tắt
This study aimed to develop a beverage from Pouzolzia zeylanica extract mixed with passion fruit juice and to identify the most suitable formulation and pasteurization conditions within the tested range in terms of sensory quality, retention of bioactive compounds, and microbiological safety. A completely randomized design was used to evaluate the effects of mixing ratio, sugar addition, citric acid addition, and temperature-time pasteurization. Among the tested formulations, the beverage with an 8:2 (v/v) ratio of P. zeylanica extract to passion fruit juice, 18% sugar, and 0.03% citric acid was selected as the most suitable formulation. This formulation achieved the highest sensory acceptance while maintaining relatively high contents of anthocyanins (1.81 mg/L), total polyphenols (4.15 mg GAE/mL), and vitamin C (8.56 mg/100mL). Pasteurization at 65 °C for 10 mins (PU = 18.57 min) ensured microbiological safety for 15 days at 4 ± 2 °C while minimizing the degradation of heat-sensitive compounds. These findings provide a scientific basis for the development of a bioactive-rich beverage from locally available plant materials.
Từ khóa
Anthocyanins, mixing ratio, passion fruit, pasteurization, polyphenols, Pouzolzia zeylanica
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