My question is this;
In a system that is using quaternary sanitizer for food contact surfaces, and verifying the correct dilution (200 ppm) IS there a time limit that this verification should be honored or believed? I mean, does the quaternary compound dissipate? If we mix the sanitizing solution, verify correct dilution and fill respective sanitizing buckets at the beginning of a shift will that same batch still be acceptable for the day? Shift? In this scenario the rags used are single use, as in they do not return to the bucket after use.
All thoughts appreciated...