Question

what is the principal of limit test for iron​

Answer 1

Explanation:

Principle: Limit test of Iron is based on the reaction of iron in ammonical solution with thioglycollic acid in presence of citric acid to form iron thioglycolate which is pale pink to deep reddish purple in color. Earlier aamoniumthiocyanate reagent was used for the limit test of iron.

Answer 2

Answer:

Principle: Limit test of Iron is based on the reaction of iron in ammonical solution with thioglycollic acid in presence of citric acid to form iron thioglycolate which is pale pink to deep reddish purple in color. Earlier aamoniumthiocyanate reagent was used for the limit test of iron.