Re: MAPS: Marquis test may be not reliable enough

[Jim Hogshire <pagg@xxxxxxxxxxxxx>]

when the pigs ransacked my appartment a few years back, their sophisticated
Marquis test gave them visible satisfaction when they applied it to a
family-sized baggie with a half pound of tyrosine.  

But the tester was an older dude who nodded his head and seemed to agree when i
told him I wasn't surprised cuzza what it was and what the test probably really
looked for.

Hey, how do you use phenylalanine in plant cultures?  That's something I'm
begininning to get into and I'm intensely interested in different media....


Jim

On Fri, 18 Jun 1999, Perf. Fungi E. wrote:

> This morning I woke up with the idea that the Marquis-test for ecstasy 
> tablets may be a bit too simple to fool. If I am right the addition 
> of a small amount of phenylalanine to the carrier of each tablet 
> would give a positive reaction. Crystal l-phenylalanine is cheap (half 
> a kilo costs some $250). Since it is a common non-psychoactive amino 
> acid and has many uses (for instance in plant tissue culture) it can 
> easily obtained from any supplier of biochemicals. In the Netherlands 
> it should even be available through most if not all chemists.
> 
> So does there exist any simple test for the methylenedioxy-structure? 
> It would be so much easier to have a test like that!
> 
> Rene
> 
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