Xuezhonghong extract and its preparation method and application
A technology of extract and extract, which is applied in the field of Xuezhonghong extract and its preparation, can solve the problems of thick leathery leaves of Xuezhonghong, and achieve the effect of simple process and fresh and elegant smell
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Embodiment 1~11
[0039] After the red leaves in the snow are dried and removed, they are grinded by a FSJ-114 plant sample grinder, weighed 20g, put into a Soxhlet extraction tube, added 300mL solvent for Soxhlet extraction, the distillate is dried, and the petroleum ether is rotary evaporated Or weigh after ethanol. Calculate the yield of Xuezhonghongye extract.
[0040] Extraction rate = Xuezhonghong extract weight (g) / Xuezhonghong leaves weight (g)×100﹪
[0041] Among them, the weight of the red leaves in the snow is the dry weight without water.
[0042] The extraction conditions are as shown in Table 2:
[0043] Table 2 Extraction conditions and yields of Examples 1-18
[0044]
[0045] Example 4
[0046] Tests have proved that using the process provided by the present invention, the Soxhlet extraction of the red leaves of the snow can obtain good yields.
Embodiment 12
[0047] Example 12 GC-MS analysis of extract
[0048] After distilling the extracts prepared in Examples 1-11, the distillate was collected for GC-MS analysis.
[0049] The analysis adopts the 6890 / 5973N gas chromatography-mass spectrometer.
[0050] Chromatographic column: HP-5 (50m×0.25mm×0.50μm) capillary column; carrier gas: helium (He); flow rate: 1mL / min; injection volume 1μL; inlet temperature 280℃, split ratio 1: 20. Column temperature program: starting temperature at 50℃, keep for 5min, then increase to 260℃ at a rate of 5℃ / min, keep for 10min; ion source temperature: 250℃, ionization mode: EI; electron energy: 70eV; mass scanning range: 33~550amu.
[0051] By comparing the mass spectrum data of volatile flavor substances with the data in the computer standard spectral library NIST02, qualitative and quantitative analysis of various volatile components is carried out. The results are shown in Table 3:
[0052] Table 3 Composition analysis of Xuezhonghongye extract
[0053] ...
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