Abstract

ABSTRACT Equilibrium moisture content (EMC) data for safflower seeds were obtained by equilibrating them at 11 to 96% relative humidity (ERH) and 10, 25, 40, and 55° C above saturated salt solutions. Five EMC-ERH models (modified Henderson, Chung-Pfost, Halsey, Oswin, and G.A.B.) were fitted to the data and were evaluated using mean relative percent error, standard error of moisture content, and residual plots. At a constant relative humidity, equilibrium moisture content decreased with increasing temperature. The G.A.B. model described the EMC data the best. The Oswin model was better than the Henderson, Chung-Pfost, and Halsey models. No single statistical parameter was able to indicate the superiority of EMC-ERH models. ASAE Data D245.4 should be revised to include models other than the modified Henderson and Chung-Pfost for description of EMC-ERH data of cereals and oilseeds.

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