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.