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质量标准  

  >75.0%(GC)：

外观Appearance                                        白色粉末

红外光谱鉴别Infrared spectrometry          Conforms

总甾醇 content of total phytosterols           ≥95%

β—谷甾醇β—sitosterols                          >75.0% (GC)

豆甾醇stigmasterol                                     ≤5%

菜籽甾醇brassicasterol                               ≥15%  

干燥损失Loss on drying                             <3.5 %

比旋度Specific optical rotation                    -24°～ -34°(c=2, CHCl3)

灰分Ash                                                     0.1 % (typically)

总甾醇total sterols (GC):                            > 95%

总甾醇组成(GC):

β—谷甾醇β—sitosterols                          >75-80.0% (GC)

豆甾醇stigmasterol                                     ≤5%

菜籽甾醇brassicasterol                               ≤15%

分析标准品，95%：

外观Appearance                                       白色粉末

红外光谱鉴别Infrared spectrometry         Conforms

纯度Purity                                                ≥95.0% (GC)

纯度Purity                                                ≥95.0% (HPLC) 

氯仿溶解试验solubility in Chloroform         Clear ,50 mg/mL

比旋光度Specific rotation [a]20/D             -39.0°～ -33.0°(C=0.5 , Chloroform )