Fingerprint Analysis of PolygonumavculareL. Using High-Performance Liquid Chromatography

An HPLC method was established to control the quality of PolygonumavculareL. The active ingredients in PolygonumavculareL. samples were extracted with methanol, and then analyzed by high-performance liquid chromatography (HPLC). The fingerprint of PolygonumavculareL. as well as its 11 typical peaks were established. The HPLC method demonstrated good precision, reproducibility, and stability, with the relative standard deviations of retention time and peak area less than 3%.     

耐磨铸铁组织形态与性能的关系

为提高灰铸铁的耐磨性,必须使组织与磨损形式相适应。最常用的措施是强化基体和改善润滑特性。另外,还必须改善硬质相和其它组织的形态。