Fasi question

[cheddar_bob]

In regards to FASI, from my reading it appears to precip a cleaner salt than FASW. If one has 91%ipa am I correct in the thought that FASI wold work but would not be as clean a final product as using 99-100%?

Also is there any reason one could not use methanol in place of ipa (FASM)?

Finally, doing a FASI/FASM precip first... Would doing a FASW afterwards be worthwhile to extract b-carbolines?


Thanks!

 

[cheddar_bob]

Looks like I found my answer:


5ml of methanol, ethanol, isopropanol or ecetone were saturated with SWIM's dmt fumarate, then the solvent siphoned off and evaporated. The residue was weighted. The results are:

Acetone : practically 0mg/ml (there was a very thin layer of residue left, impossible to scrape

IPA : ~1mg/ml. The residue was still too little to be weighted properly

Ethanol : ~5mg/ml

methanol: ~10mg/ml