Objective To standardize the method of microbiological examination on Shegan Mixture in Chinese Pharmacopoeia 2015. Methods Chinese Pharmacopoeia 2015 was used. Microbial enumeration test and specified microorganisms test were used to verify Shegan Mixture. The samples were treated by membrane filtration. Six kinds of strains for microbiological counting and limiting bacteria were used to study applicability. Results Microbial counts of the five strains of the recovery ratio were between 0.5 to 2, and Escherichia coli tested by control bacteria was qualified. Conclusion The microbiological examination methods for Shegan Mixture can meet the requirements of Chinese Pharmacopoeia 2015.

Objective:To investigate the situation for clinical antibiotic usage in West China Hospital of Stomatology. Methods:By using specially designed survey table, a retrospective study was carried out and the data of antibiotic usage for all the patients from March to August 2003 were analyzed by computer.Results:A total of 1139 cases were investigated and antibiotics were used in 84.72% of the cases. Single drug,2-drug-combination and 3 or more were used in 36.52%,43.91% and 4.30% of the patients.Antibiotics were administrated by intravenous injection in 93.7% of the cases.The antibiotic application for preventive purpose was in 64.87% of all the subjects.The cost of antibiotics contributed to 48.78% in total drug expenses.Conclusion:It is necessary to strengthen the management of antibiotic application.

Objective:To analyze the chemical constituents in Radix astragali by high-performance-liquid chromatography-time of flight mass spectrometry(HPLC-TOF/MS). Methods:An Agilent poroshell 120 SB-C18 column(100 mm × 3 mm,2. 7 μm)was adopt-ed. The mobile phase was composed of acetonitrile-0. 1% formic acid with nonlinear gradient elution. The flow rate was 0. 4 ml· min-1 . The UV detection wavelength was set at 254nm, the column temperature was 25℃ and the injection volume was 10μl. Electron spray ionization and positive mode was adopted, the flow and temperature of the carrier gas( N2 ) was 10 L·min-1 and 350℃, respec-tively. The capillary voltage was 4 kV, the bombardment voltage was 165 V, the spectra were recorded within the range of m/z 100~1 100. Results:A total of 24 chemical constituents were identified from Radix astragali by HPLC-TOF/MS simultaneously. Conclu-sion:An efficient and fast HPLC-TOF/MS approach has been established for studying the chemical constituents in Radix astragali, which lays the foundation for the study on pharmacodynamic material basis and quality control of Radix astragali.