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现货正品|Buffered Peptone Water Preenrichment|缓冲蛋白胨水
原理：
这些preenrichment媒体包含蛋白胨作为碳源,氮、维生素和矿物质。氯化钠维护渗透平衡。磷酸盐缓冲媒介。
脱水样品制备：
1. Dissolve the powder in 1 L of purified water: Difco or BBL Buffered Peptone Water – 20 g; Difco Buffered Peptone Casein Water – 20 g. Mix thoroughly.
2. Autoclave at 121°C for 15 minutes.
3. Test samples of the finished product for performance using
stable, typical control cultures.
过程：
Refer to appropriate references for details on test methods using these media.Inoculate tubes with the test sample. Incubate tubes at 35 ± 2°C for 18-24 hours in an aerobic atmosphere, or as instructed in the appropriate reference.
用途：
Buffered Peptone Water and Buffered Peptone Casein Water are used for preenriching injured Salmonella species from food specimens to increase recovery.
预期结果：
Growth is indicated by turbidity.
Limitation of the Procedure
The types and numbers of competing flora in the test sample can affect recovery and may overgrow salmonellae. |