Method, using response surface methodology, for optimizing ultrasonic extraction technology of free anthraquinone from cassia seeds
A technology of free anthraquinone and extraction process, applied in organic chemistry, quinone separation/purification, etc., can solve the problems of unstable processing quality, low economic benefit, poor technical conditions, etc., and achieve accurate and reliable extraction conditions and high extraction rate. Effect
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[0027] ① Determination of free anthraquinone:
[0028] Determination of the standard curve: Prepare 0.1 mg / mL l,8-dihydroxyanthraquinone standard solution with 0.5% magnesium acetate-methanol as solvent, accurately measure 0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 mL respectively, and set In a 10mL volumetric flask, add solvent to the volume, shake well, and measure its absorbance at a wavelength of 510nm. Use 0.5% magnesium acetate-methanol solution as a blank control, and the mass concentration of 1,8-dihydroxyanthraquinone is between 5 and The equation of the standard curve within the range of 30μg / mL is: Y = 0.3332X + 0.0294, R2 = 0.9954.
[0029] Determination of free anthraquinone: draw 2mL of each extract into a separatory funnel, add 3mL of water, shake vigorously, extract twice with 8mL and 7mL of chloroform, add 2mL of distilled water to wash, collect the chloroform solution, evaporate to dryness on a water bath, add 5mL of 0.5% Dissolve in magnesium acetate-methanol solution...
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