The Positive Control Kit for ALP Test Swab(Alkaline Phosphatase) consists of 10 vials of one concentration of ALP (350 mU/L). This is the globally recognized regulatory maximum for ALP levels in pasteurized milk products. A Negative Control is made by heat-inactivating a sample of the milk type the user is calibrating. This provides a background reading that can be used as a baseline. Each Positive Control vial is then reconstituted with the heat-inactivated milk.

The Positive Control confirms the functionality of ALP Test Swab and calibrate each type of dairy product sample. Prior to using ALP test swabs, positive and negative controls should be run initially. Calibration using negative and positive controls should be performed regularly (e.g., once a week), although the instrument default setting is once a month. Recalibration is required whenever a new manufacturing lot of ALP Test Swabs is introduced or when testing a different type of milk.

• 2–8°C, protect from light, valid for 12 months. 
• For Positive Controls, check the expiration date on the box label. Do not use it after the expiration date. 
• The Negative Control should be used within 48 hours when stored at 2 – 8 °C. 
• Reconstituted Positive Controls must be used within 7 days when stored at 2 – 8 °C.