Separation and purification of deoxynivalenol (DON) mycotoxin from wheat culture using a simple two-step silica gel column chromatography

Deoxynivalenol (DON) is a type B trichothecenes mycotoxin produced by several Fusarium species, often found in foodstuffs for humans and animals. DON is in great demand for the toxicological researches both in vivo and in vitro. In this work, wheat culture was inoculated with a Fusarium graminearum PH-1 strain for DON production. The solvent system for crude extraction was acetonitrile-water (84:16, v/v). A simple two-step silica gel column chromatography was employed to separate the DON mycotoxin from wheat culture, combined with preparative high performance liquid chromatography (preparative HPLC) to purify the compound. The solvent system for the second silica gel column chromatography was methylene chloride-methanol (17:1, v/v), which provided a good elution effect selected on thin layer chromatography (TLC). The target compound was identified by HPLC, and the chemical structure was confirmed by mass spectrometry (MS) and H-1 and C-13 nuclear magnetic resonance (NMR) spectroscopy. A total of 433 mg of purified DON was obtained from 1 kg of wheat culture, with a purity of 99.01%. The study had provided an easy-operating and cost-effective method to isolate an expensive compound in a simple way.