Got a source on that? Not trying step on your toes or undermine what you said, but i need alittle more then that. Research, possible studies on alkane/butane extractions of alfatoxins. Because with the research i have done so far this is the kind of results i typically find in the link i pasted. I just need a little more then the generic (it will extract alfatoxins)
Attached is the C17H12O6 Aflatoxin B1 molecule, which you can see is a highly oxygenated (polar) aromatic hydrocarbon with a molecular wt of
312.277 g/mol. That suggests that it is soluble in other hydrocarbons, both polar and non polar.
In fact, even though it is a polar molecule, non polar vegetable oil contamination is one common problem, and it is typically extracted from the non polar vegetable oil using polar solvents, or SCFE water.
One of them also discusses an alkaline wash to further reduce aflatoxin levels.
Here is a link to a SCFE water extraction study.
https://cdn.intechopen.com/pdfs/55270.pdf
Here is one removing aflatoxins from from corn oil with a solvent mix.
https://aocs.onlinelibrary.wiley.com/doi/abs/10.1007/BF02640803
And one for solvent extraction from oil seed meals
https://pubs.acs.org/doi/abs/10.1021/jf60160a028?journalCode=jafcau
The open question of course is what those processes do to the accompanying cannabis aromatic hydrocarbon terpenes and cannabinoids?
I don't have that answer and confess that once I understood that Aflatoxins are not just poisonous, but are the most carcinogenic natural substance known to man, I elected to avoid them as opposed to seeking methods to reduce contaminated material to acceptable levels.
As it is also a poison, with an LD-50 Rat of 9mg/kg or 9 X10-6= .000009 = 9 PPM, ostensibly you would want to be below the level where half the population died, so say 10% or 9 X 10-7 = 900 parts per billionth.
I suggest less given that it is a carcinogen as well, but have no suggestions. Here is link that further discusses it.
https://www.who.int/foodsafety/FSDigest_Aflatoxins_EN.pdf