Substituted phenothiaziiies as indicators in the ferrocyanide titration of zinc.
Chlorpromazine, promethazine and diethazine hydrochlorides and prochlorperazine maleate have been tested as indicators in the ferrocyanide titration of zinc. Only the first and last are useful, giving a sharp reversible colour change in both the direct and reverse titrations, but the results are negatively biased by 0.2-1.3%.
Gowda
H S
HS
Department of Chemistry Manasa Gangotri University of Mysore Mysore, India.
Kesavan
B
B