Quote:
SWIM doesn't really know much about chemistry, but he was thinking more along the lines of taking about about a glass full of leaves from different specimens (a glass each) and kind of skipping directly to the naptha step.
That is really dangerous. You could be concentrating all kinds of hazardous compounds.
Any concerning your TLC question.
Quote:1) Cover a TLC plate in sorbant (Can any sort of glass, plastic or metal plate be used? What
should be used as sorbant for DMT?)
The sorbent (solid phase) is the material that molecules of your sample interact with as the eluent (mobile phase) passes over the plate. By covering a TLC plate you are covering a relativily inert hard surface like aluminum (not foil but a thick harder piece) or glass with a sorbent the most common is silica gel. The size of the silica gel particles is very important and must be uniform to get reproducible results. Making your own TLC plates is complicated.
I am not exactly sure where someone who is not a researcher could obtain them but there must be a an easy way. I typically buy them from chemical supply companies. I often use silica gel on aluminum or glass because its cheap and it works for the compounds I study. It should work with dmt but references need to be looked over.
Quote:2) Put the some of the sample plant material on pencil baseline about 1cm frome the bottom of
the TLC plate (Should this just be some of the ground up plant material, or must it first
be dissolved in something, or something like that?)
Yes the plant material must be crudely extracted. Many solvents could be used alcohol or methanol would be the easiest and cheapest. Basically you make a crude extract of plant material and then place some of the material on the plate let it dry and then you do whats call developing the plate.
Quote:3) Fill a glass jar about 1-2mm with solvent (What solvent should be used for DMT(straight
from the plant, so I dont know if it is in freebase or salt form)?)
This needs to be looked up. The literature should be available. You can develop your own solvent system but that takes theoretical knowledge on chromatography.
Quote:4) Put the TLC plate upright (or /ish) in the jar with solvent and seal tight (This seems
easy enough right,... right?)
Its very easy. Its one of the easiest way of analyzing plant material for substances.
Basically you put enough solvent to cover the ground of a glass chamber that fits the TLC plates but not so much as to touch the part of the TLC plate where your sample was spotted on. Then you let the chamber saturate by sealing it for a few minutes. Then add the plate and you will see the solvent moving up the plate. When it reaches the sample it will "pull" the compounds with it and depending on how the compounds in your sample interact with the sorbent and how much it wants to be in the solvent will determine how far it travels on the plate.
After the solvent has traveled x number of centimeters (depends on size of plate). You take out the plate and mark the distance in traveled.
Quote:6) Then when the TLC plate has been dried, test for DMT (How should I test if it contained
DMT, should I use UV or some other chemical, also what colour would it be, and how high?
Please keep in mind that I have never done TLC before and know very little about it)
So yes after you take the plate out you can test for alkaloids. There are different reagents that make alkaloids turn into certain colors. However some of them are a bit nasty and use some acids and stuff. But another way is the use UV light. But for that you need plates that have a flourescent tag so when you shine UV light on them they glow (need UV safe glasses!) and then the part of the plate where compounds that absorb UV light (like DMT) are show us as black spots which you can circle.
I can post some recipes for various spray reagents that react with alkaloids specifically tryptamines.
But the final thing to do is calculate the rf value which is the distance from the bottom of the plate where you spotted your sample divided by the distance the solvent traveled (not counting the distance between the bottom of the plate and your sample but the distance from when it first touched the sample). If its the same as dmt and it reacts with the spray reagent the same as dmt it could be dmt. Proving that its dmt beyond a shadow of a doubt requires more work but this is the best way to screen plants for a simple chemical substance.
I know a lot about TLC and using it for plants. I have wanted to develop a simple technique for anybody to screen plants for certain alkaloids but haven't really had the time. But if you are interested seriously in doing it I can explain more and find some time to do some experiments to figure out the hard parts.