This international Standard specifies a rapid method for estimating the number of psychrotrophic microorganisms by means of the colony-count technique at 21 ℃. The method is applicable to raw and pasteurized milk.
BS ISO 8552:2004 history
2004BS ISO 8552:2004 Milk - Estimation of psychrotrophic microorganisms - Colony-count technique at 21 °C (rapid method)