A kind of vitex leaf extract and its preparation method and application
A technology of leaf extract and sodium carbonate, which is applied in the direction of drug combination, pharmaceutical formula, cosmetic preparation, etc., can solve the problems of reduced purity and low extraction rate of flavonoids, prevent and skin pigmentation, and promote oxygen absorption , the effect of promoting metabolism
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Embodiment 1～10
[0038] Examples 1-10 Preparation methods of Vitex negundo leaf extract
[0039] Collect 250g of fresh yellow wattle leaves, wash with clean water, dry and drain water at room temperature, put the drained yellow wattle leaves into an ultrasonic extraction pot, the ultrasonic power is 80W, adjust the ultrasonic frequency, add 10% dilute alkaline water (mass fraction is 10% Sodium carbonate solution) adjust different material-liquid ratios, extract, sieving, and discard the residue. The filtrate obtained is dried in a vacuum drying oven at a temperature of 60° C. for 12 hours, and then powdered to obtain the Vitex negundo extract. The experimental conditions are shown in Table 1:
[0040] Table 1 Example 1-10 Extraction temperature, ultrasonic frequency, extraction time, material-to-liquid ratio
[0041]
[0042] The results show that the method for preparing the extract of Vitex negundo provided by the present invention can ensure that the extraction rate is above 5.5%.
Embodiment 11
[0043] Example 11 Identification of the quality of the Vitex negundo extract prepared by the present invention
[0044] The method for detecting the total flavonoid content in the Vitex negundo leaf extract prepared by the present invention is as follows:
[0045] 1. Qualitative test of flavonoids
[0046] According to the displayed reaction of flavonoids, preliminary qualitative detection of flavonoids
[0047] 1.1 Hydrochloric acid-aluminum powder experiment: slight yellow-green foam reaction, the foam intensifies after heating;
[0048] 1.2 Zirconium salt-citric acid reaction experiment: sample 0.1mg+10ml methanol solution+1ml 2%ZrOC12→yellow→2%citric acid methanol solution→yellow complex;
[0049] 1.3 1% aluminum trichloride experiment: the resulting complex is light yellow, showing yellow fluorescence under ultraviolet light (λmax=415nm);
[0050] 2. The establishment and drawing of rutin standard curve
[0051] Rutin was used as a reference substance to determine the content of total...
Embodiment 12
[0062] Example 12 Preparation of skin care composition
[0063] After mixing 150g aloe vera, 25g peony and 100ml water, mash it, sieving with 1 volume of water 3 times, collecting the filtrate to obtain product A; after grinding the filter residue, sieving it with 50ml water for 2 times, collecting the filtrate to obtain product B;
[0064] Squeeze 23g lemon and 25g onion juice, add 50ml water and sieve twice, collect the filtrate to obtain product C;
[0065] Mix 5g wolfberry, 15g corn, 10g soybeans, and 5g angelica, and grind into powder to obtain product D;
[0066] Mix product A, product B, product C, and product D, add 1 volume of water and sieve twice, collect the filtrate, adjust the pH value to 6.5 to 7.0, and extract 18.148 g of Vitex negundo leaf extract prepared in Example 10 and avocado extract 20 g of the substance, 10 g of glycerin, heated at 80 degrees Celsius for 2 hours, cooled to 4 degrees Celsius for 60 minutes, and after being jelly-like, the skin care composition ...
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