How do you find diesel adulteration?

How do you find diesel adulteration?
If there is adulteration in diesel, you will gt late throttle response.
There will be ignition delay. A good diesel gives wafer crisp power delivery & quick throttle response.

Good quality diesel gives excellent low end torque & strong pulling power from lower RPM.

As per obsevation of Multijet engine of FIAT :-
In multijet engine, good quality diesel burns with clattery sound on idle.

In multijet engine ,at cold start ,Adulterated diesel gives diesel clatter but diesel clattter disappears when engine goes to operating temp. In multijet engine at full operating temperature diesel clatter disappears & engine revs like petrol engine without sound of diesel clatter.