Corn Starch Yield Calibrations with NIR
M. R. Paulsen,* S. W. Mbuvi
Illinois Council on Food and Agricultural Research; U.S. Department of Agriculture

Laboratory-dried corn had a 0.9 to 16.0 percentage point range in extractable starch reduction due to drying at 90? to 100?C rather than ambient temperatures. Corn obtained from commercial crossflow dryers had a maximum reduction of 3.1 percentage points for corn dried at 110?C. The crossflow configuration did not reduce extractable starch as much as the laboratory dryers. Each percentage point gain in extractable starch is estimated to be worth a minimum of 4 to 6 cents per bushel. The NIR and NIT calibrations may be used as a rapid method for checking dried corn for extractable starch.