haohan纤维素等药用辅料中所含的甲氧基、乙氧基和羟丙氧基测定填充柱25%苯基-75%甲基聚硅氧烷

采用气相色谱法（通则0521）或容量法测定甲基纤维素、乙基纤维素、羟丙纤维素或羟丙甲纤维素等药用辅料中所含的甲氧基、乙氧基和羟丙氧基。
    可选择法或第二法测定，当第二法测定结果不符合规定时，应以法测定结果为判定依据。
    法（气相色谱法）
    色谱条件与系统适用性试验 用25%苯基-75%甲基聚硅氧烷为固定液，涂布浓度为20%的填充柱，

名称：填充柱
固定相：25%苯基-75%甲基聚硅氧烷
规格：3m*3mm
应用：药典
  Determination of methoxy, ethoxy and hydroxypropyl groups in pharmaceutical excipients such as methyl cellulose, ethyl cellulose, hypromellose or hypromellose by gas chromatography (General Chapter 0521) or volumetric method Oxygen.
You can choose the first method or the second method for measurement. When the measurement result of the second method does not meet the requirements, the measurement result of the first method should be used as the basis for determination.
The first method (gas chromatography)
Chromatographic conditions and system suitability test 25% phenyl-75% methyl polysiloxane was used as the stationary solution, and a packed column with a coating concentration of 20% was used.

Name: Packed Column
Stationary Phase: 25% Phenyl-75% Methylpolysiloxane
Specifications: 3m*3mm
Application: Pharmacopoeia