为了比较红景天属不同红景天药材的有效成分的差异,采用HPLC-DAD法建立了同时测定青藏高原14种红景天属药材中红景天苷、酪醇、没食子酸、儿茶素、表儿茶素含量的方法.色谱柱为Phenomenex Luna C18(250×4.6 mm,5μm);以甲醇-水为...为了比较红景天属不同红景天药材的有效成分的差异,采用HPLC-DAD法建立了同时测定青藏高原14种红景天属药材中红景天苷、酪醇、没食子酸、儿茶素、表儿茶素含量的方法.色谱柱为Phenomenex Luna C18(250×4.6 mm,5μm);以甲醇-水为流动相,梯度洗脱;流速为1.0 mL/min;检测波长为276 nm;柱温为30℃。结果表明,在五种化合物在选定的条件下能得到较好的分离,线性关系良好。方法回收率在97.36%以上,RSD小于2.31%。该方法简单快速,可为红景天属药材的质量控制提供科学依据。展开更多
A new RP-HPLC method for the determination of lead in Rhodiola species was established on a Shim-pack Vp-ODS column(150 mm×4.6 mm I.D.,5μm) at UV 255 nm.The column temperature is 300C.Bis(Salicyladehyde)o-ph...A new RP-HPLC method for the determination of lead in Rhodiola species was established on a Shim-pack Vp-ODS column(150 mm×4.6 mm I.D.,5μm) at UV 255 nm.The column temperature is 300C.Bis(Salicyladehyde)o-phenydnediiminato was used as a on line derivate agent and MeOH-H2O-derivate agent(65:33.5:1.5,v/v) was made use of mobile phase.The method was applied for the determination of lead and the lineal range of lead is 0.1352-0.6759ng(r=0.9989).The average recovery is 99.2% with RSD being 2.9%(n=5).展开更多
文摘A new RP-HPLC method for the determination of lead in Rhodiola species was established on a Shim-pack Vp-ODS column(150 mm×4.6 mm I.D.,5μm) at UV 255 nm.The column temperature is 300C.Bis(Salicyladehyde)o-phenydnediiminato was used as a on line derivate agent and MeOH-H2O-derivate agent(65:33.5:1.5,v/v) was made use of mobile phase.The method was applied for the determination of lead and the lineal range of lead is 0.1352-0.6759ng(r=0.9989).The average recovery is 99.2% with RSD being 2.9%(n=5).