Test Kit Result

[Vet]

Marquis - purple/black in 1-3 seconds

Simons - no color change

Robadope - no color change


Marquis indicates MDXX

Shouldn't Simons also change color if it is an MDXX substance?

 

[phase_dancer]

Yes. Whatever mixture is in the pills, it doesn't contain any primary or secondary amine - e.g. MDA or MDMA,

i.e. if the amine test results are reliable (buffer added, age of reagents, etc.)

Many compounds can produce a dark red-purple-black reaction product with Marquis. Thay is why it's good to have another reagent like Mandelin or Mecke on hand to back up the Marquis result.

 

[djfriendly]

Expired Simon's kit is also a possible explanation. We had that happen with a DanceSafe kit once - we were dubious of the "known MDMA sample" the customer claimed to be testing, but we sent a new Simon's kit and it worked as expected.

 

[phase_dancer]

Simons will deteriorate faster if exposed to heat or light.