National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops, College of Horticulture & Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China.
Zigui County Agricultural and Rural Bureau, Yichang 443600, China.
Molecules. 2023 Jan 20;28(3):1079. doi: 10.3390/molecules28031079.
Peach leaf orange dark tea (ODT) is a fruity tea made by removing the pulp from peach leaf orange and placing dry Qingzhuan tea into the husk, followed by fixing them together and drying. Since the quality of traditional outdoor sunlight fixing (SL) is affected by weather instability, this study explored the feasibility of two new fixing methods, including hot air fixing (HA) and steam fixing (ST). Results showed that fixing method had a great impact on ODT shape, aroma, and taste. Compared with SL and ST, HA endowed ODT with higher fruit aroma, mellow taste, better coordination, and higher sensory evaluation score. Physical-chemical composition analysis showed that SL-fixed orange peel was higher than HA- or ST-fixed peel in the content of polyphenols, flavonoids, soluble protein, hesperidin and limonin, while HA has a higher content of volatile substances and contains more alcohols, aldehydes and ketones, and acid and esters than ST and SL. Activity analysis showed that HA was superior to ST or SL in comprehensive antioxidant activity and inhibitory activity against α-glucosidase. Comprehensive results demonstrated that HA has better performance in improving ODT quality and can replace the traditional SL method in production.
桃叶橙黑茶（ODT）是一种果味茶，制作方法是去除桃叶橙的果肉，然后将干青砖茶放入果皮中，再将它们固定在一起并干燥。由于传统的户外阳光固定（SL）质量受到天气不稳定的影响，本研究探讨了两种新的固定方法的可行性，包括热空气固定（HA）和蒸汽固定（ST）。结果表明，固定方法对 ODT 的形状、香气和口感有很大影响。与 SL 和 ST 相比，HA 赋予 ODT 更高的果香味、醇厚的口感、更好的协调性和更高的感官评价得分。理化成分分析表明，SL 固定的橙皮中多酚、类黄酮、可溶性蛋白、橙皮苷和柠檬苦素的含量高于 HA 或 ST 固定的橙皮，而 HA 中的挥发性物质含量高于 ST 和 SL，并且含有更多的醇、醛和酮以及酸和酯。活性分析表明，HA 在综合抗氧化活性和抑制α-葡萄糖苷酶活性方面优于 ST 或 SL。综合结果表明，HA 在改善 ODT 质量方面表现更好，可以替代传统的 SL 方法进行生产。
