摘要
目的通过建立准确可靠的定值方法及不确定度分析研究,研制具有可溯源和量值传递功能的黄芩及其水、95%乙醇提取物中黄芩素成分分析标准物质。方法根据《中华人民共和国计量法》和标准物质研制技术规范与相关技术文件要求,利用黄芩素国家一级纯度标准物质的量值传递功能,采用高效液相色谱法对黄芩及其水、95%乙醇提取物中黄芩素成分分析标准物质进行均匀性和稳定性检验;采用高效液相色谱法-多家实验室协作标定的方法,确定黄芩中药材、黄芩95%乙醇提取物、黄芩水提取物中黄芩素成分的含量标准值及不确定度评估。结果所研制的黄芩及其水、95%乙醇提取物中黄芩素成分分析标准物质均具有良好的均匀性和稳定性,黄芩素成分含量分别为(7.95±0.23)%,(4.29±0.12)%,(8.80±0.40)%(k=2)。结论所研制的标准物质属国家级计量有证标准物质,具有量值准确、可溯源的特性,可为我国传统中药材及其提取物中有效物质和成分的标准化与国际化提供必要的标准物质、物质标准和标准方法。
Objective Through establishing accurate,reliable analytical method of evaluation and uncertainty analysis,to develop the certified reference materials(CRMs) of baicalein in Scutellaria Baicalensis and its alcohol extract,water extract which have measurement traceability and value transfer function.Methods On the basis of Technical Norm of Primary Reference Material and related documents requirements,using the quantity transmission of the national level CRM of baicalein,the homogeneity and the stability were checked by high performance liquid chromatography(HPLC),the content standard value and uncertainty of CRMs of baicalein in scutellaria baicalensis and its 95% alcohol extract,water extract were determined by HPLC in collaboration with a number of laboratories.Results The series of CRMs showed satisfactory homogeneity and stability.The content values of baicalein were(7.95±0.23) %,(4.29±0.12) %,(8.80± 0.40) %(k = 2),respectively.Conclusion The series of CRMs are assigned as national measurement of CRMs,which possess a high-accuracy value and traceability characteristics.The series of CRMs could provide the accurate and reliable CRM,materials standard and standard methods for standardization and internationalization of active ingredient of traditional Chinese medicines and extracts.
引文
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