检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:邱学艳[1] 林厚文[1] 沈利明[1] 刘皋林[2] 金光洙[3] 张恒弼[4]
机构地区:[1]第二军医大学长征医院药学部,上海200003 [2]上海交通大学附属第一人民医院药剂科,上海200080 [3]延边大学医学院,延吉133000 [4]中国人民解放军第208医院药剂科,长春130061
出 处:《药学服务与研究》2006年第2期129-132,共4页Pharmaceutical Care and Research
基 金:上海市科委中药现代化专项重点课题资助项目(02DZ19117)
摘 要:目的:考察不同显色剂对紫外-可见分光光度法测定玉竹总皂苷含量的影响,确定最优显色方法。方法:采用紫外-可见分光光度法测定玉竹总皂苷含量,分别用三种显色剂,显色剂A为浓硫酸:甲醇(4:1),检测波长为405nm;显色剂B为5%香草醛-冰乙酸:高氯酸:乙酸乙酯(2:8:10),检测波长为518nm;显色剂C为5%香草醛-冰乙酸:高氯酸:冰乙酸(2:8:10),检测波长为518nm。结果:采用方法c显色,玉竹总皂苷在6~36μg/mL范围内线性关系良好(r=0.9999)。低、中、高3种浓度(0.4、0.5、0.6μg/mL)对照品溶液的日内RSD分别为1.05%、0.22%、1.20%(n=5),日间RSD分别为1.25%、1.08%、1.30%(n=5)。低、中、高3种浓度(0.34、0.39、0.44μg/mL)的加样回收率分别为(99.18±1.47)%、(100.32±0.72)%、(97.65±0.66)%(n=5);样品溶液在24h内稳定。结论:方法C优于方法A和B,为最佳显色方法,重复性实验RSD最小,加样回收率和精密度最高,溶液稳定性最好。Objectives: To investigate the effects of different chromogenic agents on determination of content of total sapo nins from Polygonatum odoratum by UV spectrophotometry,and to establish the optimal chromogenie method. Methods: Total saponins were determinated by UV spectrophotometry with three different chromogenic agents, namely sulfuric acid : methanol (4 : 1) detected at 405 nm (method A),5% vanillin-glacial acetic acid : perchloric acid : ethyl acetate (2 : 8 : 10)at 518 nm (method B) and 5% vanillin-glacial acetic acid : perchloric acid , glacial acetic acid (2 : 8 : 10) at 518 nm (method C). Results: The linear range of saponins was 6 36μg/mL(r=0. 999 9) using method C. The intra-day RSD at low, middle and high concentrations(0.4, 0.5, 0.6μg/mL ) were 1.05%, 0.22% and 1.20% (n=5), and the inter day RSD were 1.25%, 1.08% and 1.30% (n=5), respectively. The average recovery at low, middle, high concentrations (0.34, 0.39, 0.44 μg/mL) were (99.18±1.47)%,(100.32±0.72)% and (97.65±0.66)%(n=5), respectively. The sample was stable in 24 hours. Conclusion: Method C is the optimal ehromogenic method. The RSD of method C is lowest, its reproducibility, precision and average recovery rate are highest and the stability of sample solution is best.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.229