Separation and purification method of three iridoid components in radix scrophulariae
A technology for the separation and purification of iridoids, applied in chemical instruments and methods, organic chemistry, preparation of sugar derivatives, etc., can solve the problems of irreversible adsorption, time-consuming, laborious, and environmental pollution, and achieve no loss of samples and reduce The effect of high cost and recovery rate
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[0029] Example 1
[0030]The ratio of solid to liquid: 1:10, 1:15, 1:20, 1:25, 1:30 respectively; the experimental results show that with the increase of the ratio of solid to liquid, the extraction rate of iridoids also gradually When the ratio of solid to liquid reaches 1:20, the extraction rate reaches the highest value, the ratio of solid to liquid continues to increase, and the extraction rate shows a downward trend. It may be because, with the increase of the solid-liquid ratio, the contact area between the solution and the Scrophulariaceae powder becomes larger, which is conducive to the enzymatic hydrolysis reaction; but when the solid-liquid ratio is too large, the cellulase in the reaction system will be reduced. concentration, and the catalytic activity of cellulase [9] , thereby reducing the extraction rate of iridoid components. Therefore, the material-liquid ratio of 1:20 was taken as the central level, and the subsequent orthogonal experiment optimization was ...
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[0031] Example 2
[0032] Solution pH: 3, 3.5, 4, 4.5, 5, respectively. The experimental results showed that when the pH was between 3 and 3.5, the extraction rate of iridoids gradually increased and reached the maximum value at pH 3.5; when the pH exceeded 3.5, the extraction rate decreased significantly. This is because pH is an important factor affecting the enzymatic hydrolysis efficiency. When the cellulase is at a suitable pH, the enzymatic activity is the highest and the enzymatic hydrolysis reaction efficiency is the highest. When the pH exceeds 3.5, the enzymatic activity decreases and the enzymatic hydrolysis efficiency is reduced. also gradually decreased. Therefore, the solvent pH 3.5 was taken as the central level, and the subsequent orthogonal experiment optimization was carried out.
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[0033] Example 3
[0034] Extraction time: Select the extraction time as 0.5h, 1h, 1.5h, 2h, 2.5h, respectively. The experimental results show that the extraction rate of iridoids in the extraction time of 0.5 to 2 hours is in a gradually increasing trend. This is because in the initial stage of extraction, the enzyme concentration is high and the enzyme activity is large, which can quickly The cell wall of ginseng was enzymatically hydrolyzed, and the iridoids were dissolved out, so that the extraction rate gradually increased; but when the extraction time was longer than 2h, the extraction rate of iridoids began to gradually decrease. Therefore, the extraction time 2h was taken as the center level, and the subsequent orthogonal experiment optimization was carried out.
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