Investigations on the kinetics of the concentration of deoxynivalenol (DON) and on spoilage by moulds and yeasts of wheat grain preserved with sodium metabisulfite (Na 2 S 2 O 5 , SBS) and propionic acid at various moisture contents
2010
Dänicke, Sven | Pahlow, G. | Beyer, M. | Goyarts, Tanja | Breves, G. | Valenta, Hana | Humpf, H.-U.
Unground wheat kernels contaminated with 2.09 mg deoxynivalenol (DON) per kg dry matter were stored for up to 56 days at moisture contents of 15, 17.5 and 20% to study the alterations of DON concentration when the wheat was stored either unsupplemented or supplemented with 5 g sodium metabisulfite (Na 2 S 2 O 5 , SBS), 10 g propionic acid (PA) or 5 g SBS plus 10 g PA per kg. SBS addition alone or in combination with PA reduced the DON contamination to 1.2-4.3% of the initial DON concentration while DON concentration of unsupplemented and wheat batches supplemented only with PA varied inconsistently or remained unchanged. The SBS-related DON reduction was paralleled by a concomitant increase in the concentration of the non-toxic reaction product DON sulfonate. In contrast to the unsupplemented wet-stored controls, SBS addition prevented the growth of moulds and yeasts when added alone or in combination with PA. In conclusion, for the conditions examined, the wet preservation of DON-contaminated wheat with SBS seems to be promising as an on-farm detoxification measure.
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Editeur Taylor & Francis
ISSN 0003-942X | 1745-039X | 1477-2817Cette notice bibliographique a été fournie par Friedrich-Loeffler-Institut
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