RESUMO
To illuminate the similarities and differences between wild and cultivated Sarcandra glabra (S. glabra), we performed a comprehensively study on 26 batches of cultivated S. glabra and 2 batches of wild S. glabra. Chemical constituents and distribution characteristics of roots, stems and leaves in both wild and cultivated S. glabra were investigated through UHPLC-TOF-MS method. The result revealed that there were significant differences between roots, stems and leaves in S. glabra. And the chemical contents in the root part were less or even absence than those in leaf and stem, which suggested the root organ could be excluded as medicine. Meanwhile, the chemical contents of stems and leaves in cultivated S. glabra was sightly higher than that of wild samples. Therefore, cultivated S. glabra may have a high potential for substitution of wild S. glabra without affecting its pharmaceutical properties. In summary, our study could provide important information to the molecular basis for quality control of S. glabra.
RESUMO
OBJECTIVE: To establish a near infrared spectroscopy method for the determination of the concentration of tiopronin for injection. METHODS: By using optical fiber probes and 1 mm sampling accessories, the near infrared transmission reflectance spectra of tiopronin for injection from seven pharmaceutical factories were obtained. The partial least square method was applied to establish the model with HPLC as the reference method. RESULTS: The model had a good prediction performance. The value of the correlation coefficient (r2) was 99.0%, the mean difference of prediction for test sets was 1.30%, and the root mean square error of prediction (RMSEP) was 0.982%. CONCLUSION: NIR is a rapid, reliable and powerful method for the quantitation of tiopronin for injection, and can be applied to rapid drug determination on the spot and stability study. Copyright 2012 by the Chinese Pharmaceutical Association.