Method for extracting antioxidant components of solidago canadensis L. by response surface method
A technology of antioxidant components and response surface methodology, applied in chemical instruments and methods, compositions for inhibiting chemical changes, etc., can solve the problems of low precision, low extraction efficiency, unable to find the best combination and response value, etc. Achieve high precision and efficiency, high removal rate
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Embodiment 1
[0051] Effect of Extraction Solvent on Extraction Rate of Total Phenols and OH Scavenging Rate
[0052] Weigh five parts of Solidago canadensis pollen, each 1.0000g, and then use a Soxhlet extractor to degrease; add the degreased Solidago canadensis pollen to the solvent to make the liquid-solid ratio 20:1, and control the temperature at 40 Under the condition of ℃, carry out ultrasonic extraction for 30min, the power of the ultrasonic wave is 100W, and the solvents are 60% acetone aqueous solution, 60% ethyl acetate aqueous solution, 60% ethanol aqueous solution, 60% methanol aqueous solution and ultrapure water respectively 20.00mL, to investigate the effect of solvent on the extraction rate of total phenols and the scavenging rate of OH. like figure 1 As shown, when acetone is used as the extraction solvent, the concentration of total phenols ( figure 1 The ability of adopting phenolic concentration to express in) and OH scavenging rate is all stronger, therefore, the pre...
Embodiment 2
[0054] The effect of the volume fraction of acetone on the extraction rate of total phenols and the scavenging rate of ·OH
[0055] Weigh six parts of Solidago canadensis pollen, each 1.0000g, use a Soxhlet extractor and carry out reflux degreasing treatment in petroleum ether, add volume fractions of 40%, 50%, 20.00mL of 60%, 70%, 80% and 90% acetone aqueous solution (volume fraction) was ultrasonically treated at 40°C for 30min, and the ultrasonic power was 100W. The effect of acetone concentration on the extraction rate of total phenols and OH removal rate was investigated. Specific findings such as figure 2 As shown, as the concentration of acetone (acetone volume fraction) increases, the OH scavenging rate decreases, while the extraction rate of total phenol fluctuates. When the volume fraction of acetone is 40%-60%, the extraction of total phenol first decreases and then increases; while When the volume fraction of acetone was greater than 60%, the extraction rate of t...
Embodiment 3
[0057] Effect of Liquid-Solid Ratio on Extraction Rate of Total Phenols and ·OH Scavenging Rate
[0058] Weigh six parts of Solidago canadensis pollen, each 1.0000g, use a Soxhlet extractor and carry out reflux degreasing treatment in petroleum ether, respectively according to the liquid-solid ratio of 10:1, 20:1, 30:1, 40: 1. Add 40% acetone aqueous solution at 50:1 and 60:1, ultrasonicate at 40°C for 30 minutes, and the ultrasonic power is 100W, and investigate the effect of liquid-solid ratio on the yield of total phenols and hydroxyl scavenging rate. The specific results are as follows image 3 As shown, with the increase of the liquid-solid ratio, the yield of total phenols showed an increasing trend, and the OH clearance first decreased and then increased. When the liquid-solid ratio was greater than 30:1, the OH clearance rate began to increase, and the liquid-solid ratio When it is 60:1, although the total phenol extraction rate and OH clearance rate are high, the amou...
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