Changes in chemical composition, physical properties and microstructure of duck egg, during salting for
up to 14 days, were determined. Duck egg consisted of 10.87% shell, 54.73% egg white and 33.94% yolk.
Salting resulted in an increase in weight proportion of egg white, but a decrease in yolk proportion. Moisture
contents of both egg white and yolk decreased gradually with concomitant increases in salt and ash
contents as the salting time increased. Protein and lipid contents increased slightly in both interior (viscous
portion) and exterior (hardened portion) egg yolk with increasing salting time. Oil exudation was
observed in yolk, particularly in exterior yolk. Triacylglycerols and phospholipid, found as the major lipids
in egg yolk, underwent slight changes, but no differences in protein patterns of either egg white or egg
yolk were observed during salting.