FOOD TECHNOLOGY

Detailed explanation-1: -The chlorine and QAC test strips are good (when properly stored) for a minimum of 24 months from the date of purchase. Write the date you received the test strips on the vial, and you can reasonably assume and assign and expiration date 18 months from the receipt.

Detailed explanation-2: -In clean water, the amount of total chlorine can be used to determine the amount of free chlorine in the water since combined chlorine should be at zero. If, however, there is some combined chlorine in the water alongside free chlorine, the measurement of total chlorine is essentially useless.