文献类型： 外文期刊
作者： Han, Xue 1 ; Song, Zhiqin 1 ; Liu, Jiawei 3 ; Zhang, Yeshan 3 ; Wu, Mingkai 1 ; Liu, Hai 1 ;
作者机构： 1.Guizhou Acad Agr Sci, Inst Modern Chinese Herbal Med, Guiyang 550002, Peoples R China
2.Guizhou Inst Crop Variety Resources, Guiyang, Peoples R China
3.China Guizhou Univ, Guizhou Key Lab Agr Biotechnol, Guiyang 550006, Peoples R China
关键词： Bletilla striata scented tea; gas chromatography-mass spectrometry (GC-MS); relative odor activity value (ROAV); drying method; quality
期刊名称：MOLECULES （ 影响因子：4.6； 五年影响因子：4.9 ）
ISSN：
年卷期： 2023 年 28 卷 6 期
页码：
收录情况： SCI
摘要： Flower tea is widely loved as a drink, especially for the beautiful and rich flowers of the orchid family, and the drying method for different flowers is also unique. GC-MS is widely used to study volatile substances to determine the quality of flower teas. The findings show that the freeze-drying method can retain the original aroma and flavor of Bletilla striata has the highest sensory evaluation score, with the key flavor substances ethyl caproate and N-heptanal containing 1.14% and 6.28%, respectively, and their ROAV values reaching 54.46 and 100.00. Additionally, the freeze-drying method can well retain flavonoids, polysaccharides, and phenolic components, while providing better antioxidant and antibacterial properties. The stove-drying method would make Bletilla striata slightly burnt and less flavorful and efficacious than freeze-drying; the air-drying method is difficult to retain the special odor and fragrance of Bletilla striata flowers and has the lowest sensory evaluation score, with the presence of volatile components with irritating and unpleasant odors such as pyrazine and 2-pentylfuran, while not showing better efficacy. In addition, steam fixation would destroy the morphology and flavor of Bletilla striata, lose polysaccharide and phenolic components, and reduce the efficacy of Bletilla striata scented tea, but could retain the flavonoid components well. In summary, direct freeze-drying without steam fixation is the best process for drying Bletilla striata scented tea, stove-drying without steam fixation is more economical and convenient in actual production and application, steam fixation and air-drying are not suitable as drying processes for Bletilla striata scented tea. This study analyzed the quality of Bletilla striata scented tea under different drying methods, promoted the further processing of Bletilla striata scented tea, and provided a reference for the comprehensive utilization of Bletilla striata scented tea.
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