..i remember an ER article in which an ayahuasca admixture plant (possibly a Calliandra) was several times found by GCMS to contain DMT, but HPLC found the same compound to be 2meTHBC..but i don't have the issue/date..
AlbertKLloyd?
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..a bit more info. on re-agents & the NMT 2001 tests:
the most successful reagent for DMT/NMT and related alkaloids was Silicotungustic Acid Reagent
[see:
http://www.sciencelab.com/page/S/PVAR/10426/SLS1552 for constituents/availability]
(with a little chemical knowledge one can prepare one's own solution much more cheaply)
'M'(2002) subjected a number of acacias to reagent testing, following Roveli(1967)'s recommendation for alkaloid field testing..
2-4 grams of fresh plant material was ground in a mortar and pestle with sand..this was mixed with DCM (or hexane), the sand and goo filtered,
and the solution (approx. 10-20ml) put in a test tube..
..to each test tube, the reagent was added (parallel tests were also done with Mayer's reagent, but the results were slightly less clear)..solutions with large amounts of alkaloid would become thickly cloudy, whereas trace amounts would result in very mildly cloudy but still mainly clear solutions.. (the + to ++++ strength scale)..
some of the color changes observed (with Silicotungustic reagent) were:
DMT (P. viridis, A. phlebophylla leaf) - salmon pink>orange
NMT (isolated from A. obtusifolia & A. mucronata) - orange>browny orange
Acacia obtusifolia extract - browny orange>grey + UV fluoresence
Acacia maidenii leaf - browny orange + UV fluoresence
Acacia mucronata leaf - slightly oragne>purple>grey + UV fluoresence
Acacia fimbriata leaf - yellow>grey green (possibly phenethylamine)
under various conditions most tryptamines will show UV fluoresence, particularly 5-meoDMT, but at different wavelengths and not as strongly as betacarbolines..
hope this encourages a few people to try some field tests to add to our collective knowledge...