Milk from spoiling
Depends on what sort of phosphatase your asking about. Phosphatase Test in the Milk industry is to determine if pasteurization is successful. Phosphatase is a naturally occurring enzyme, and helps the body adsorb nutrients such as Calcium. However, this enzyme becomes inactive at temps* used for pasteurization (for killing harmful bacteria in milk). So pretty much if a Phosphatase test is positive, it means that the pasterurization has not been successful. Pasteruization is a mix of both heat and time. generally most bacteria will die at temp of 64 degrees celcius and higher, for 30mins. NB: the higher the temp the sorter the holding time can be. for e.g. 80 degrees celcius for 15mins does the job. Hope this helped answer your question