A kind of bamboo leaf flavonoid cellulose adsorbent, preparation method and application thereof
A technology of bamboo leaf flavonoids and cellulose, applied in the field of analytical chemistry, can solve problems such as difficult operation, difficult operation, complexity, etc., and achieve the effects of improved adsorption performance, low toxicity and high thermal stability
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[0026] 1. Preparation of adsorbent: Weigh 20.0 g of ionic liquid and 4.0 g of non-polar protic solvent in a beaker to dissolve poplar wood chips, mix and shake well; stir with an electromagnetic stirrer for 3 hours at 100°C. Filter and dry.
[0027] Preferably, the ionic liquid is 1-allyl-3-methylimidazole chloride, and the non-polar protic solvent is dimethylsulfoxide.
[0028] 2. Adsorption and separation of flavonoids from bamboo leaves: Pretreat ordinary bamboo leaves with ultrasonic waves for 40 minutes (800W), use 80% ethanol as the extractant, extract according to the mass ratio of solid to liquid at 1:8, the reflux temperature is 70°C, and macropore adsorption The resin was separated and eluted with ethanol to obtain the crude extract of bamboo leaf flavonoids.
[0029] Accurately weigh 10 g of the prepared adsorbent and put it into a stoppered Erlenmeyer flask, add 40 ml of prepared 2 mg / ml bamboo leaf flavonoid crude extract solution, and adsorb on a constant temper...
Embodiment 1
[0034] Weigh 20.0 g of 1-allyl-3-methylimidazole chloride and 4.0 g of dimethyl sulfoxide in a beaker to dissolve poplar wood chips, mix and shake well. At 100°C, stir with a magnetic stirrer for 3h. Suction filtration and drying are enough, and the structure of poplar wood chips before and after treatment can be seen figure 2 and image 3 ,Compared figure 2 and image 3 It can be seen that after soaking treatment, the cellulose of poplar wood chips becomes loose and porous, which is an excellent material as an adsorbent;
[0035] Accurately weigh 10 g of the prepared adsorbent and put it into a stoppered Erlenmeyer flask, add 40 mL of bamboo leaf flavone crude extract solution with a concentration of 2 mg / mL, and adsorb on a constant temperature water bath shaker at 25 °C for 6 h. Samples were taken every hour for testing.
[0036] In order to test the effect of the present invention on adsorption and separation of bamboo leaf flavonoids, the content determination expe...
Embodiment 2
[0038] The difference between this example and Example 1 is that the ionic liquid is changed to 1-ethyl-3-methylimidazole chloride, and other conditions remain unchanged.
[0039] In order to test the effect of the adsorbent prepared by the ionic liquid on the adsorption and separation of bamboo leaf flavonoids, the content determination experiment of bamboo leaf flavonoids was carried out, and the adsorption rate can reach 45.74%, and it was found that its adsorption effect on bamboo leaf flavonoids is not good. Therefore, The present invention does not select the ionic liquid for the preparation of the adsorbent.
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