Limit Test for Iron
Aim: To perform the limit test for iron for the given sample. Requirements: Nessler cylinder, 2ml bulb pipette, 20% w/v iron-free citric acid, thioglycolic acid, ammonia solution, iron standard solution (20 ppm Fe), glass rods, red-litmus paper. Principle: In this experiment, the test color (purple) obtained by the reaction of iron impurities with mercaptoacetic acid …