Standard Quality Control Sample of Total Coliform in Drinking Water (Multi-tube Fermentation Method)|BNCC360412 |BNCC

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Standard quality control sample of total coliform bacteria in drinking water

Culture medium	Peptone: 10.0, beef powder: 3.0, sodium chloride: 5.0, agar: 15.0,pH: 7.3±0.1(25 ℃)
Subculture procedure	Samples required a total of 100mL of sterile water or sterile saline to dissolve. Before use, place the quality control sample at room temperature for 30min, then open it in the biosafety cabinet, immediately add 3~4mL of sterile water, suck it out after dissolution, and put it into a sterile bottle. The remaining sterile water is repeatedly washed with the inner wall of the vial, and all of it is transferred to the above sterile bottle, which is the standard quality control sample with a concentration of 100-2000MPN/100mL.
Growth conditions	37°C, aerobic, 18-24h
Storage conditions	-20 ℃, protected from light
Safety level	2
application	Specific Uses: Applicable Standards for Quality Control Samples of Total Coliform Group in Drinking Water (Multi-tube Fermentation Method): GB/T5750.12-2023 "Standard Test Methods for Drinking Water Part 12: Microbiological Indicators" and "GB 8538-2022 National Food Safety Standard Test Methods for Drinking Natural Mineral Water"
Sharing mode	Public welfare sharing