| Title: | Effects of Different Drying Methods on the Quality of Bletilla striata Scented Tea |
| Author(s): | Han X; Song Z; Liu J; Zhang Y; Wu M; Liu H; |
| Address: | "Institute of Modern Chinese Herbal Medicine, Guizhou Academy of Agricultural Sciences, Guiyang 550002, China. Guizhou Institute of Crop Variety Resources, Guiyang 550006, China. Guizhou Key Laboratory of Agricultural Biotechnology, China Guizhou University, Guiyang 550006, China" |
| DOI: | 10.3390/molecules28062438 |
| ISSN/ISBN: | 1420-3049 (Electronic) 1420-3049 (Linking) |
| Abstract: | "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" |
| Keywords: | *Steam Odorants/analysis Gas Chromatography-Mass Spectrometry Pheromones *Orchidaceae Tea Bletilla striata scented tea drying method gas chromatography-mass spectrometry (GC-MS) quality relative odor activity value (ROAV); |
| Notes: | "MedlineHan, Xue Song, Zhiqin Liu, Jiawei Zhang, Yeshan Wu, Mingkai Liu, Hai eng 2021YFD1601002/Ministry of Science and Technology/ [2022]4038/Department of Science and Technology of Guizhou Province/ [2021]21/Youth Fund of Guizhou Academy of Agricultural Sciences/ Switzerland 2023/03/30 Molecules. 2023 Mar 7; 28(6):2438. doi: 10.3390/molecules28062438" |
