Preparation of Nitrate Standard Solution (2ppm) for Limit Test

PROCEDURE:

Dissolve and dilute 0.163 g of potassium nitrate to 100ml with water. Dilute 1 volume of above solution to 10 volumes with water (100 ppm NO3). Dilute 1 Volume of nitrate standard solution (100 ppm NO3) to 50 Volumes with water.