What test is used to determine the efficiency of pasteurization?

The phosphatase test is utilized to determine the efficiency of pasteurization because it measures the activity of the enzyme phosphatase, which is found in raw milk. During pasteurization, this enzyme is inactivated. If phosphatase activity is present after pasteurization, it indicates that the milk did not reach the required temperature for the necessary amount of time, suggesting that the pasteurization process was inadequate.

This test serves as an important quality control measure, helping to ensure that the pasteurized product is safe for consumption and has been processed properly. The other tests mentioned, while useful in other contexts, do not specifically measure the effectiveness of the pasteurization process in the same way that the phosphatase test does.