Bioactive Compound Yield and Antioxidant Capacity of Helicteres hirsuta Lour. Stem as Affected by Various Solvents and Drying Methods
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- 作者：Hong Ngoc Thuy Pham ; Van Tang Nguyen ; Quan Van Vuong ; Michael C. Bowyer and Christopher J. Scarlett
- 刊名：Journal of Food Processing and Preservation
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：41
- 期：1
- 全文大小：126K
- ISSN：1745-4549
文摘
Different parts of Helicteres hirsuta Lour. (H. hirsuta L.) have been used as traditional medicines, however limited studies have been conducted on the preparation of dried material or the extraction of bioactive compounds. This study aimed to determine the effect of various solvents and drying methods on the bioactive compound yield and antioxidant capacity of the H. hirsuta L. stem. The results showed that water was the best solvent for obtaining the highest levels of phenolics and flavonoids, whereas methanol was the solvent of choice for saponin extraction. Among assessed drying methods, hot-air drying at 80C revealed as the best method to maintain the bioactive components (phenolics of 8.99 mg GAE/g, flavonoids of 9.60 mg CE/g and saponins of 15.18 mg ESE/g), and DPPH, ABTS, and FRAP antioxidant activities. Thus hot-air drying at 80C is recommended for preparation of dried H. hirsuta L. stem for further processing steps.