A blank digest was carried out in the same way (digestion
conditions for microwave system were applied as 2 min for
250 W, 2 min for 0 W, 6 min for 250 W, 5 min for 400 W,
8 min for 550 W, vent: 8 min, respectively).
In order to validate the microwave digestion method for
accuracy and precision, NIST SRM 1573a Tomato Leaves
certified reference material were analyzed for corresponding
elements.