Total bacterial count standard substance in water quality|374021 |BNCC

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Quality control sample of total bacterial count in drinking water

Growth conditions	37 ° C, aerobic, 18-24h;
Subculture procedure	1.Culture the bacteria under appropriate conditions to obtain a bacterial suspension.2.Measure the absorbance of the bacterial suspension and calculate its initial concentration using the standard formula.3.Multiply the initial concentration by the survival rate to obtain the post-lyophilization actual concentration.4.Dilute the bacterial suspension to achieve the target concentration based on the post-lyophilization actual concentration, followed by aliquoting and lyophilization.
Storage conditions	-20 ° C, refrigerated in the dark; Ice pack transportation
Sharing mode	Public welfare sharing