Seven steps for the determination of egg yolk index

Developed by CRNA Nutritional Laboratory, DSM Nutritional Products, France

Sabrina GERARD Senior Technician Angéline MELON TechnicianMurtala UMAR FARUK Ph.D, Scientist

Step 1 : Break the egg to separate the egg yolkfrom the egg white

Step 2 : Place the yolk on a support

Step 3 : Measure the diameter (D1) of the yolk

Step 4 : Turn the instrument to 90° and measure the diameter (D2) of the yolk

Step 5 : Measure the height (H) of the yolk

Step 6 : Measure the height (h) of the support

Step 7 : Calculation

=× 2

1 + 2

Where:H : height of yolkh : height of supportD1 : Diameter of yolkD2 : Diameter of yolk (at 90° of D1)