Method for establishing HPLC fingerprint of dichloromethane part of root of costus speciosus (koening) smith as Yao medicinal material
A kind of technology of Dichloromethane and Fingerprint of Yimujiang
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[0061] The method for establishing the HPLC fingerprint of the dichloromethane of Yaomu ginger includes the following steps:
[0062] (1) Prepare the test solution: accurately weigh 2.0000 g of Mother ginger medicinal material, add 50ml of ethanol solution with a volume fraction of 70% accurately, weigh it, ultrasound for 60 min, let it cool and weigh it to make up for the weight loss After filtering, add 20 ml of 3mol / ml hydrochloric acid solution to the filtrate, reflux in a water bath for 2 hours, let it cool, adjust to neutral with 40% sodium hydroxide solution, evaporate to dryness in a water bath, and heat the residue with 30 ml Dissolve the water and transfer it to a separatory funnel for extraction with chloroform. Extract twice, 30 ml each time, combine the chloroform fractions and evaporate to dryness. The residue is made up to a 10 ml brown volumetric flask with methanol. Filter by 0.22 µm organic filter membrane, ready to be obtained;
[0063] (2) Prepare the reference...
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