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| Study on temperature-dependent infrared spectrum of astragalus membranaceus |
| Li Qian, Sha Shuli, An Yongsheng, Meng Wei, Bo Jiaojiao, Zhou Guanlin |
| Hebei Global Testing Technologies Limited, Shijiazhuang 050000, China |
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Abstract The astragalus membranaceus structure had been studied by infrared (IR) spectrum. The CH2 asymmetrical stretching vibration mode (ν■-astragalus membranaceus), CH2 asymmetrical stretching vibration mode (ν■-sstragalus membranaceus), C=O stretch vibration mode (νC=O-sstragalus membranaceus) and C-O stretch vibration mode (νC-O-C-astragalus membranaceus) were found also. The thermal stability of astragalus membranaceus were researched by temperature-dependent infrared (TD-IR) spectrum. In the tem-
perature range 303 ~ 393 K, the reduced thermal stability of astragalus membranaceus were found also. The key roles of TD-IR spectrum in the structure and thermal stability analysis of the important medicinal and edible powder food (astragalus membranaceus) was demonstrated.
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