Conclusion The developed Petri dish culture method was suitable for microbial limit test on lactose, glucose, gel, starch and trypsin, and membrane filtration method for that on purified water.

• 结论平皿法适用于检测乳糖、葡萄糖、明胶、淀粉、胰酶等原辅料的微生物限度，薄膜过滤法适用于检测纯化水的微生物限度。