Standard quality control sample of thermostable coliform in drinking water (multi-tube fermentation method)|BNCC360414 |BNCC

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Standard quality control samples of heat-resistant coliform bacteria in drinking water (multi-tube fermentation method)

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, totaling 100mL mL, 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 use: drinking water heat-resistant coliform group quality control samples (multi-tube fermentation method) applicable standards: GB/T5750.12-2023 "drinking water standard test methods part 12: microbial indicators"
Sharing mode	Public welfare sharing