The correct way to check if a sanitizer is too strong or too weak is by using sanitizer test strips designed for the specific type of sanitizer (e.g., chlorine, quaternary ammonium, or iodine). The process involves dipping the test strip into the prepared sanitizer solution for the recommended time, then comparing the color change on the strip to a color chart provided with the test strips. This comparison reveals the concentration of the sanitizer in parts per million (ppm). If the sanitizer concentration is too low, it will be ineffective at killing germs. If it is too high, it can be toxic, may leave residue, or cause surface damage. To adjust, add more sanitizer if too weak or add water to dilute if too strong. It is crucial to follow manufacturer's guidelines for mixing and testing, and to check the sanitizer strength regularly. Typical acceptable concentrations are:
- Chlorine sanitizer: 50 to 200 ppm
- Quaternary ammonium sanitizer: 150 to 400 ppm (manufacturer-dependent)
- Iodine sanitizer: 12.5 to 25 ppm
Always use the correct test strips for the sanitizer and avoid dipping strips into foam as it can give false readings. Also, do not stir the solution with the test strip during testing. This method ensures the sanitizer is at an effective and safe level.
