Ethanol and formamide were determined by capillary column gas chromatography using FID detector .Water was used as extracting solvent and n-butanol was used as internal standard.

• 采用水作萃取溶剂,正丁醇作内标,毛细管柱气相色谱法测定伊维菌素中残留溶剂乙醇和甲酰胺的含量。