An arnebia root ointment determining method
A method of determination, the technology of comfrey oil, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems that the color spots cannot be clearly distinguished, the steps are complicated, etc., and achieve effective detection, good reproducibility, and determination Effects in simple steps
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Embodiment 1
[0018] Take 20mL of the drug to be tested, add 20mL of sodium hydroxide solution with a mass percentage concentration of 4%, and stir continuously under heating in a water bath. After the solution turns blue,
[0019] Centrifuge at 3000r / min for 1 minute to separate the solution, remove the supernatant of the lower layer, add dilute hydrochloric acid solution with a mass percent concentration of 5% to adjust the supernatant to appear red, then use 20 mL of chloroform to extract twice, combine the extracts, and steam in a water bath Dry, add methanol 1mL to the residue as the test solution, and take another 2g of comfrey reference medicinal material, add 20mL of sodium hydroxide solution to extract, and make the reference medicinal material solution in the same way; On the same silica gel G thin-layer plate, the upper layer solution of sherwood oil-toluene-ethyl acetate-formic acid is a developer, wherein the volume ratio of sherwood oil-toluene-ethyl acetate-formic acid in the ...
Embodiment 2
[0021] Take 20mL of the drug to be tested, add 20mL of sodium hydroxide solution with a mass percentage concentration of 4%, and stir continuously under heating in a water bath. After the solution turns blue, centrifuge at 3000r / min for 1 minute to separate the solution. Dilute hydrochloric acid solution with a concentration of 5% adjusts the clear liquid to appear red, then extracts it twice with 20 mL of chloroform, combines the extracts, evaporates to dryness in a water bath, adds 1 mL of methanol to the residue as the test solution, and takes 2 g of comfrey as a reference medicinal material , add 20mL of sodium hydroxide solution to extract, and prepare the reference medicinal material solution in the same way; absorb 10 μL each of the test sample solution and the reference medicinal material solution, respectively spot on the same silica gel G thin-layer plate, and use petroleum ether-toluene-ethyl acetate-formic acid The upper layer solution is developing agent, wherein, ...
Embodiment 3
[0023] Take 20mL of the drug to be tested, add 20mL of sodium hydroxide solution with a mass percentage concentration of 4%, and stir continuously under heating in a water bath. After the solution turns blue, centrifuge at 3000r / min for 1 minute to separate the solution. Dilute hydrochloric acid solution with a concentration of 5% adjusts the clear liquid to appear red, then extracts it twice with 20 mL of chloroform, combines the extracts, evaporates to dryness in a water bath, adds 1 mL of methanol to the residue as the test solution, and takes 2 g of comfrey as a reference medicinal material , add 20mL of sodium hydroxide solution to extract, and prepare the reference medicinal material solution in the same way; absorb 10 μL each of the test sample solution and the reference medicinal material solution, respectively spot on the same silica gel G thin-layer plate, and use petroleum ether-toluene-ethyl acetate-formic acid The upper layer solution is developing agent, wherein, ...
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