How to check Contamination or cross contamination

Is there any procedure to check contamination
If both lines are running with different products connected with one AHU.

How we can measure or check the contamination.

Take a sample from return riser and analyze that on HPLC or UV for the product running in the adjacent area where a different product is being processed. This will give you an idea if there is any cross-contamination.


Thank you sir.
will add this point.