Video - MDMA Test Demo
Here's a demonstration of how MDMA is tested with the 1st primary reagent, Marquis. The test result is positive and indicative of presence of MDA/MDMA or some analogue like 5-MAPB. Hence, to further confirm MDMA's presence, we'll need to test using the Mecke reagent too.
Watch how the colour quickly changes from deep purple to black.
Next, a test with the Mecke reagent which shows a quick colour change from green to black, which tells us that the sample is MDMA/MDA. Do note that the Mecke reagent on its own is dark, so if the color stays brown afer being dropped on the sample, it means there's no colour reaction/change.