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双料乳糖胆盐(含中和剂)培养基
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更新时间:2016-06-15  |  阅读:1722

详情介绍

双料乳糖胆盐(含中和剂)培养基 Double Lactose Bile Medium 250g 用于化妆品中粪大肠菌群的测定(GB标准)

用途:用于化妆品中粪大肠菌群的测定(GB标准)

双料乳糖胆盐(含中和剂)培养基配方:(g/L)
蛋白胨
乳糖
牛胆盐
溴甲酚紫
pH值 7.4 ± 0.2 
40.0
10.0
20.0 
0.02
25℃
原理:
        蛋白胨提供氮源,维生素,生长因子;乳糖提供能源;牛胆盐抑制革兰氏阴性菌生长;溴甲酚紫作为指示剂。
用法:

        称取本品 70.0g,溶解于1000ml 蒸馏水中,分装到有倒立发酵管的20mm×150mm试管中,每管10ml,115℃高压灭菌 15 分钟,备用。

质量控制:

 在36±1℃培养18-24小时。

质控菌株
菌株编号
生长情况
其它特征
金葡萄球菌
ATCC25923
-
-
大肠埃希氏菌
ATCC25922
+++
产气、变黄
弗氏柠檬盐杆菌
ATCC43864
+++
产气、变黄
肺炎克雷伯氏菌
ATCC10031
+++
产气、变黄
沙门氏菌
ATCC14028
+++
不产气、浑浊
阴沟肠杆菌
ATCC23355
+++
产气、变黄

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