Reduction of deoxynivalenol in barley by treatment with aqueous sodium carbonate and heat.
Naturally contaminated lots of Canadian barley containing either 18.4 or 4.3 microg/g deoxynivalenol (DON) were heated at 80 degrees C, with small amounts of water or 1 M sodium carbonate solution to study the rate of DON reduction. Samples were heated in sealed polypropylene containers for periods of up to 8 days. In the 18.4 microg/g DON barley, rapid reductions were observed: with no solutions added, DON declined to 14.7 microg/g after 1 day, and to 4.9 microg/g after 8 days solely due to heat; with water at 10 mL/100 g barley, DON levels reached 3.7 microg/g after 8 days; with 1 M sodium carbonate solution added at 10 mL/100 g barley, DON declined to 4.7 microg/g after 1 day, and to 0.4 microg/g after 8 days; with 20 mL/100 g barley, DON declined to 1.4 microg/g after 1 day and to near-zero levels after 8 days. In the 4.3 microg/g DON barley, more gradual reductions were evident: with no solutions added, DON declined to 2.9 microg/g after 8 days solely due to heat; with water at 10 mL/100 g barley, DON levels reached 2.3 microg/g after 8 days; with 1 M sodium carbonate solution added at 10 mL/100 g barley, DON declined to 2.7 microg/g after 1 day, and to near-zero levels after 8 days; with 20 mL/100 g barley, DON declined to 1.4 microg/g after 1 day and to near-zero levels after 3, 5 and 8 days.
Abramson
David
D
Cereal Research Center, Agriculture and Agri-Food Canada, 195 Dafoe Road, Winnipeg, Manitoba R3T 2M9, Canada. dabramson@agr.gc.ca
House
James D
JD
Nyachoti
C Martin
CM
D000821:Animal Feed; D002254:Carbonates / Q000737:chemistry*; D005670:Fusarium / Q000254:growth & development*; D001467:Hordeum / Q000737:chemistry*; D006358:Hot Temperature; D010935:Plant Diseases / Q000382:microbiology*; D014255:Trichothecenes / Q000737:chemistry*; D014867:Water / Q000737:chemistry
D002254:Carbonates; D014255:Trichothecenes; D014867:Water; C005686:sodium carbonate; C007262:deoxynivalenol