Physical properties of quinoa seeds

Abstract

Physical properties of quinoa (Chenopodium quinoa Willd.) seeds were determined as a function of moisture content. In the moisture range from to 4.6 to 25.8% dry basis, the 1000-seed mass increased from to 2.5 to 3.1 g, the sphericity from 0.77 to 0.80, the density from 928 to 1188 kg m-3, the porosity from 0.19 to 0.44, the angle of repose from 18 to 25°, the static coefficient of friction from 0.14 to 0.27 and the terminal velocity from 0.6 to 1.02 m s-1. Only the bulk density decreased with moisture content from 747 to 667 kg m-3. In the range of moisture evaluated, all properties showed moisture dependence according to linear relationships with correlation coefficients higher than 0.90. © 2003 Silsoe Research Institute. All rights reserved Published by Elsevier Ltd.