What does PPM stand for in relation to sanitization?

In the context of sanitization, PPM stands for "Parts Per Million." This unit of measurement is used to indicate the concentration of a substance in a solution, specifically in terms of how many parts of that substance exist in one million parts of the solution.

When discussing sanitizing solutions and their effectiveness, PPM helps establish the right concentration needed to effectively kill pathogens and ensure food safety. For instance, sanitizers like chlorine or quaternary ammonium compounds have specific PPM levels that are effective for sanitization. If a solution has the correct PPM, it means it’s been diluted appropriately and will function effectively to disinfect surfaces.

The other choices do not accurately reflect a commonly recognized standard in sanitization practices. Therefore, understanding that PPM signifies "Parts Per Million" is essential for anyone involved in food safety management, as it relates directly to the effective use of sanitizers in food service operations.