Hi All,
During our recent BRC audit, we received a non conformance against clause 4.11.7.4 due to not having a test in place to test for chemical residue post CIP operations.
For caustic, we take sample from point of entry, and from point exit, to determine pH levels. We also use phenolpthalein dye which can indicate any residual caustic. This point was fine and accepted by the auditor.
For sanitiser, I am unsure as to what tests we should be running. We do not rinse the line after sanitising prior to use, and as such, pH measurements would probably not be sufficient?. What methods could we implement to ensure we have no chemical residue remaining after this step?
Thanks in advance