Determination of mangiferin in rat plasma and aqueous humor by HPLC / 中国中药杂志

A HPLC method was developed for the determination of mangiferin in rat plasma and aqueous humor. 4-Nitrophenol was used as internal standard. Analysis was performed on a Cosmosil ODS C18 analytical column (4.6 mm x 250 mm, 5 microm) with mobile phase consisting of methanol-water (40: 60) with 2% glacial acetic acid at a flow rate of 1.0 mL x min(-1). The calibration curve of mangiferin in rat plasma and aqueous humor showed excellent linear behaviors over the investigated concentration of 0. 50-250.00 mg x L(-1) in plasma and 0.10-10.00 mg x L(-1) in aqueous humor, respectively, and the correlation coefficients were all above 0.995 4. The intra-day and inter-day precisions for all samples were measured to be below 12%. The limit of quantitation was 0.10 mg x L(-1) and low enough for the determination of mangiferin in all samples. The validated method has been successfully applied to preliminary pharmacokinetics study of mangiferin in rat plasma and aqueous humor.

Analysis of use of anti-infectives in the hospital pharmacy / 中国基层医药

Objective To analyze the use of anti-infectives in our hospital pharmacy and to provide basis for rational clinical use of anti-infectives. Methods The analysis was conducted using the methods of defined daily use and order of consumption sum based on the raw data retrieved from Hospital Drug Inventory Management System. Results Anti-infectives using proportion after November droped. The use of varieties followed by the biggest amount of injection cefminox sodium,piperacillin sodium and sulbactam sodium for injection,cefazolin sodium needles. Medication is the highest frequency of piperacillin sodium and sulbactam sodium needles,cefminox needle,needle penicillin sodium. Conclusion Use of anti-infectives'situation wholely became stable. β-lactams,Quinolones was our clinical anti-infection treatment leading medicine. The individual frequency of use high variety took the amount rise,and it explained that still waited for the standard in antibiotics use.

Determination of magnoflorine in Coptidis Rhizoma and Phellodendri Chinensis Cortex by LC-MS / 中国中药杂志

A rapid and specific high performance liquid chromatography-mass spectrometric method was developed for determination of magnoflorine in Rhizoma Coptidis and Cortex Phellodendri Chinensis. Samples were extracted by methanol. Agilent Eclipse XDB-C18 ODS column (4.6 mm x 150 mm, 5 microm) was used, and mobile phase was methanol-water (60:40) at a flow rate of 0.8 mL x min(-1). Electrospray ionization model (ESI), and MRM model were used for quantification. The linear range of magnoflorine was 4.352-2720 microg x L(-1). The average recovery was above 98%. The method is simple, sensitive and accurate, it can be used for determination of magnoflorine in Rhizoma Coptidis and Cortex Phellodendri Chinensis.