ABSTRACT
Objective:To establish reverse-phase high-performance liquid chromatography and simultaneously determine gallic acid, methyl gallate, corilagin, Sennoside B, and Sennoside A levels in Sana preparations.Methods:From January to December 2021, Phenomenex Hydro-RP 80A column (4.60 mm × 250 mm, 4 μm) was used. Elution was conducted using mobile phases methanol (A)-0.2% formic acid (B). The following gradients were applied: 1%-3%A for 0-18 minutes, 3%-15%A for 18-19 minutes, 15%-17%A for 19-40 minutes, 17%-25%A for 40-45 minutes, 25%-35%A for 45-65 minutes, 35%-60%A for 65-95 minutes, 60%-90%A for 95-96 minutes, 90%-1%A for 96-97 minutes. The flow rate was 1.0 mL/minute. The column temperature was 35 ℃. The detection wavelength was 270 nm.Results:The linear ranges of gallic acid, methyl gallate, corilagin, Sennoside B and Sennoside A were 0.182-1.099 μg ( r = 0.999 9), 0.046-0.278 μg ( r = 0.999 2), 0.266-1.598 μg ( r = 0.999 4), 0.172-1.036 μg ( r = 0.999 2), and 0.176-1.056 μg ( r = 0.999 9). The average dosing recovery rates were 100.02%, 99.14%, 99.38%, 101.77%, and 100.92%, respectively. Conclusion:Reverse-phase high-performance liquid chromatography can be used for quality control of Sana preparations because of high accuracy, sensitivity, reliability, and reproduction.
ABSTRACT
OBJECTIVE:To establish a method for simultaneous determination of gallic acid and ellagic acid in Xihe majun ointment. METHODS:HPLC method was performed on the column of X-Bridge C18 with mobile phase of methanol-acetoni-trile-0.2% Phosphoric acid solution (gradient elution) at a flow rate of 1.0 ml/min,detection wavelength was 254 nm,detection temperature was 30 ℃,and injection volume was 10 μl. RESULTS:The linear range was 0.132-0.792 μg for gallic acid (r=0.999 9) and 0.108 0-0.648 2 μg for ellagic acid (r=0.999 9);RSDs of precision,stability and reproducibility tests were lower than 3%;recoveries were 95.15%-99.69%(RSD=1.64%,n=9) and 97.24%-100.43%(RSD=1.24%,n=9). CONCLUSIONS:The method is simple,accurate and sensitive,and can be used for the content determination of gallic acid and ellagic acid in Xihe majun ointment.