Hello Ian

Please refer this chapter of a book.

"Subcritical Water Extraction and Its Prospects for Aflatoxins Extraction in Biological Materials"

Subcritical Water Extraction is the best way to extract your Aflatoxins based on water . where in this technique dielectric constant of water has to reduced which make equal the dielectric constant of organic solvent which make extraction easy.

thank you

Sharad Medhe . Thank you for your answer, but I am looking for normal distilled water and powder addition for aflatoxin extraction, similar to the current commercial aflatoxin test kits with water-based extraction methods. :)