Answer:
Step-by-step explanation:
The approved range of sanitizer solutions used for cleaning the electro-freeze shake machine would depend on the specific type of sanitizer used and the requirements set by the relevant food safety regulations. Generally, a concentration of 200-400 ppm (parts per million) of chlorine or 50-100 ppm of quaternary ammonium compounds is commonly used in the food industry as a sanitizer for food contact surfaces. It is important to follow the manufacturer's recommendations and local food safety regulations for the appropriate concentration and usage of sanitizer solution in cleaning the electro-freeze shake machine.