Assay preparation
Dilute an accurately measured volume of Injection, equivalent to not less than 2 mg of doxorubicin hydrochloride, quantitatively with
Mobile phase to obtain a solution containing about 0.1 mg of doxorubicin hydrochloride per mL, and mix.
Procedure
Proceed as directed for
Procedure in the
Assay under
Doxorubicin Hydrochloride. Calculate the quantity, in mg, of C
27H
29NO
11·HCl in each mL of the Injection taken by the formula:
(CP / 1000)(L / D)(rU / rS),
in which
L is the labeled quantity, in mg per mL, of doxorubicin hydrochloride in the Doxorubicin Hydrochloride Injection taken,
D is the concentration, in mg per mL, of doxorubicin hydrochloride in the
Assay preparation, on the basis of the labeled quantity in the volume of Injection taken and the extent of dilution, and the other terms are as defined therein.