Content Determination of Oleanolic Acid and Ursolic Acid from Different Medicinal Parts in Tibetan Medi-cine Pterocephalus hookeri by UPLC-PDA / 中国药房

OBJECTIVE:To establish the method for the determination of oleanolic acid and ursolic acid in different medicinal parts of Tibetan medicine Pteocephalus hookeri,and compare the differences among the different parts. METHODS:The contents of oleanolic acid and ursolic acid from different medicinal parts(whole plant,aerial part,underground part)of P. hookeri were de-termined by UPLC-PDA. The separation was performed on Acquity UPLC HSS T3 column(150 mm×2.1 mm,1.8 μm)with mobile phase consisted of methanol-0.1 mol/L ammonium acetate(88:12,V/V)at the flow rate of 0.2 mL/min. The detection wavelength was set at 210 nm,and column temperature was 30 ℃. The sample size was 5 μL. RESULTS:The linear ranges of oleanolic acid and ursolic acid were 10.65-1065 μg/mL (r=0.9996) and 18.8-1880 μg/mL (r=0.9994),separately. The recoveries were 96.95%(RSD=1.24%,n=9) and 98.12%(RSD=2.13%,n=9),separately. RSDs of precision,stability and reproducibility tests were all less than 3%. The contents of oleanolic acid and ursolic acid from different medicinal parts in P. hookeri were in de-scending order of aerial part>whole plant>underground part;the average total content of oleanolic acid and ursolic acid from whole plants was 0.35%,the aerial part reached 0.56% and underground part was 0.09%. CONCLUSIONS:The method is rapid, accurate and reproducible,and it is suitable for the content determination of oleanolic acid and ursolic acid in different medicinal parts of Tibetan medicine P. hookeri. The contents of oleanolic acid and ursolic acid from aerial part of P. hookeri are higher than whole plant and underground part. It is suggested to use aerial parts of medicine.

Quality Analysis of Radix Aucklandiae in Xianglian Preparation / 中国药师

Objective:To analyze and evaluate the quality control of Radix Aucklandiae in Xianglian preparation and develop a new quality control method for the preparation through standard testing and exploration study on 127 batches of samples .Methods:Ac-cording to the mandatory method , Radix Aucklandiae was identified by TLC .In the exploratory research , the volatile compounds in Xianglian preparation was analyzed by SPME/GC-MS, and the GC-MS fingerprints of volatile compounds in Xianglian preparation with different dosage forms were established .The contents of costunolide and dehydrocostuslactone in Xianglian preparation were determined by UPLC.Results:According to the current quality standard , all the batches of samples met the standard with the qualified rate of 100%.The composition of volatile compounds in different dosage forms was similar , while the relative contents were quite different . The contents of costunolide and dehydrocostuslactone in Xianglian preparation were different .Conclusion: The exploratory research provides reference for the further revision of drug standard and monitoring quality of the preparation .

Preparation Technology Optimization of Sinomenine Topical Paste by Orthogonal Test / 中国药房

OBJECTIVE:To optimize the preparation technology of Sinomenine topical paste. METHODS:Using“initial vis-cous force”,“holding viscous force”and“peeling strength”as index,heating and stirring time (A,h),heating temperature (B,℃) and the sequence of adding composition (softening agent,blank matrix and sinomenine)(C) as influential factors,the preparation technology of Sinomenine topical paste was optimized by orthogonal test and verified. At the same time,the content of sinomenine was determined by HPLC method. RESULTS:The optimal preparation technology of Sinomenine topical pasta was as follows as adding blank matrix and sinomenine,and then adding softening agent,heating at 80 ℃,stirring for 1 h. In verification test,RSD of comprehensive score for 3 batches of samples were 2.09%(n=3);average contents of samples were 6.7 mg/g, which was in line with the requirement of ≥6.0 mg/g. CONCLUSIONS:The optimal preparation technology of Sinomenine topical pasta is reasonable,stable and feasible. The paste shows good adhesiveness and is qualified in content.

Determination of Chlorogenic Acid, Baicalin and Phillyrin in Yinhuanglian Oral Liquids by UPLC with Double-wavelength Switch / 中国药师

Objective:To establish a UPLC method for the content determination of chlorogenic acid, baicalin and phillyrin in Yinhuanglian oral liquids. Methods:An Agilent Eclipse Plus C18 column(100 mm × 2. 1mm,1. 8 μm)was used,the mobile phase was acetonitrile -0. 4% phosphoric acid with gradient elution,and the flow rate was 0. 2 ml·min-1 . The detection wavelength was set at 324 nm in the first 5 min for chlorogenic acid, and then changed to 277 nm for baicalin and phillyrin between 5 and 12 min . Results:The linear calibration curve of chlorogenic acid, baicalin and phillyrin was within the range of 39.4-355.0μg·ml-1(r=0.999 7), 90.0-810.0 μg·ml-1(r=0.999 9) and 9.4-84.6 μg·ml-1(r =0.999 5), respectively . The average recovery was 99.44%, 98. 82% and 98. 64%,respectively. Conclusion:The method is simple,reliable and accurate in the content determination of chloro-genic acid, baicalin and phillyrin in Yinhuanglian oral liquids.

Determination of Metformin Hydrochloride in Compound Metformin Hydrochloride Tablets by UV-Spectrophotometry / 中国药房

OBJECTIVE:To establish UV-spectrophotometry method in the determination of metformin hydrochloride in compound metformin hydrochloride tablets.METHODS:The determination was carried out with water as the solvent under the detection wavelength of233nm.RESULTS:There was a good linear relationship between metformin hydrochloride and its absorbability(r=0.9999)within the concentration range of1～10?g/ml.The average recovery was99.3%with RSD at0.24%(n=9).CONCLUSION:The method is accurate,fast,convenient,and which can be used to determine the contents of metformin hydrochloride in compound metformin hydrochloride tablets directly without isolation.