详情介绍
Letheen肉汤 | Letheen Broth | 250g | 用于化妆品中微生物检测。 |
用途:用于化妆品中微生物检测
Letheen肉汤配方:(g/L) | |||||||||||||||||||||
牛肉浸出粉 月示蛋白胨 吐温 80 卵磷脂 氯化钠 pH值7.0 ± 0.2 | 5.0 10.0 5.0 0.7 5.0 25℃ | ||||||||||||||||||||
原理: | |||||||||||||||||||||
牛肉浸出粉,月示蛋白胨提供氮源,维生素,生长因子;卵磷脂和吐温80能中和防腐剂,并能起到在乳浊液中分散物质的功能,卵磷脂能中和季铵盐,吐温80可中和酚、六氯酚、福尔马林,两者结合可中和乙醇;氯化钠维持均衡的渗透压。 | |||||||||||||||||||||
用法: | |||||||||||||||||||||
称取本品 25.7g,加热溶解于 1000ml 蒸馏水中,分装, 121℃高压灭菌 15 分钟,备用。 | |||||||||||||||||||||
质量控制: | |||||||||||||||||||||
在36±1℃培养18-24小时。
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