3.1.4. Determination of phenothiazine derivatives in
medicinal forms
It was found that FIA determination of phenothiazine
derivatives in aqueous micellar medium can be employed
only for tablets. For coated tablets, the auxiliary substances
in the coating and filling materials substantially interfere in
the determination; the samples were not completely soluble in aqueous medium, the consumption of titration agent was
higher as a consequence of the presence of hydrogen carbonates.