Method for extracting flavonoid components in prescription for nourishing yin, tonifying qi and activating blood by using natural deep-eutectic solvent and process optimization method thereof
A technology of deep eutectic solvent, nourishing qi and promoting blood circulation, applied in material separation, analysis of materials, organic chemistry, etc., can solve problems that have not been reported
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experiment example 1
[0059] Experimental example 1: Preparation and screening of NADESs
[0060] Accurately weigh a certain mass of hydrogen bond acceptor and hydrogen bond donor reagents, mix them in molar ratio, and stir continuously under heating in an oil bath at 80-90°C until a clear and transparent liquid is formed. The NADESs prepared in this experiment are shown in Table 1.
[0061] Table 1 Different types of NADESs prepared in the laboratory
[0062]
[0063] This experiment investigates the effect of the type of NADES on the extraction rate of the three target components in Yangyin Yiqi Huoxue prescription to find the best type of NADES. Precisely weigh 100mg of Yangyin Yiqi Huoxue prescription into a 1.5mL centrifuge tube, add Pro-Ur, ChCl-Ur, Bet-Gly, Pro-Mu, ChCl-La and Bet-Lac at a ratio of 150:1mg / mL to liquid , the mixture was centrifuged at 4500rpm for 10min with a centrifuge, and the supernatant was taken. HPLC analyzed and calculated the extraction rates of the three effect...
experiment example 2
[0067] Experimental Example 2: Single Factor Experiment
[0068] Effect of water content on extraction rate: Make NADES into solvents with water content of 30, 40, 50, 60, 70%, accurately weigh 100mg of formula for nourishing yin, benefiting qi and activating blood, put it in a 1.5mL centrifuge tube, and follow the 100% Ratio of solid to liquid: Add natural deep eutectic solvent, plug tightly, shake well, and extract at 50°C for 30min. After the extraction, the mixture was centrifuged at 4500rpm for 10min with a centrifuge, and the supernatant was diluted with 1:1 methanol water, then suction filtered, and used for HPLC detection of puerarin, calycosin, and formononetin at different water contents. rate as figure 2 shown.
[0069] The water content (water ratio) of NADES is a key factor affecting the physical and chemical properties of the solvent, which can change the polarity and viscosity of NADES. Adding water to NADES can increase its fluidity, while too much water ma...
experiment example 3
[0076] Experimental Example 3: Methodological Investigation
[0077] Specificity test: Accurately draw the appropriate amount of the mixed reference solution and the formula for nourishing yin, nourishing qi and activating blood, and measure according to the aforementioned chromatographic conditions. The peak shapes of puerarin, calycosin and formononetin in the sample and the mixed standard Well, resolution greater than 1.5, see Figure 6 and Figure 7 . It shows that the specificity of the method is good.
[0078] Investigation of the linear relationship: Accurately draw an appropriate amount of No. 1 mixed solution, and perform multiple dilution to obtain No. 2-7 mixed solution. That is, the concentration of puerarin is 0.5000, 0.2500, 0.125, 0.0625, 0.0313, 0.0156 mg / mL, the concentration of calycosin is 0.200, 0.100, 0.050, 0.025, 0.0125, 0.006 mg / mL, and the concentration of formononetin is 0.100, 0.050 , 0.025, 0.013, 0.006, 0.003mg / mL, perform HPLC analysis accordi...
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