Here are some TLC Rf Values...

[TheGamer]

Here are some RF values for TLC using a silica gell plate, in a solution of 100:1.5 Methanol:Strong Ammonia
MDA 0.50
MDMA 0.55
Amphetamine 0.61
Methamphet. 0.56
Ephedrine 0.48
Phenylethylamine 0.53
DMT 0.59
DET 0.65
PCP 0.71
LSD 0.66
LSA 0.60
TheGamer

 

[Drug Dustbin]

Some of them are pretty close to each others (too close, like meth and MDMA). Maybe you should use also other solvent system to ensure your results.

 

[TheGamer]

Perhaps.. but wouldn't there also be a colour difference using Iodine staining??
TheGamer