Objective: Using the headspace Gas - chromatography methods to measure the assay of residual solvent ( acetone, ethylene chloride and ethanol) in Cefazolin sodium.

• 目的:建立一种气相色谱法同时测定原料药头孢唑林钠中有机溶剂丙酮,二氯甲烷、乙醇残留量的方法。