Describe how to test the strength of a chemical sanitizer.

Testing devices to measure the concentration of chemical sanitizing solutions are required for two reasons: (1) the use of chemical sanitizers requires minimum concentrations of the sanitizer during the final rinse step to ensure sanitization; and (2) too much sanitizer in the final rinse water could be toxic. To accurate test the strength of a sanitizing solution, one must first determine which chemical is being used - chlorine, iodine, or quaternary ammonium. The appropriate test kit must then be used to measure concentration.

If you have questions, contact Dr. Angela Fraser, Associate Professor/Food Safety Education Specialist, Clemson University, Clemson, SC.

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 AS 0708