Procedure—
Proceed as directed in the
Assay under
Cefmetazole. Calculate the quantity, in µg, of cefmetazole (C
15H
17N
7O
5S
3) per mg of Cefmetazole Sodium taken by the formula:
100(C/M)(r U / r S),
in which
C is the concentration, in µg per mL, of cefmetazole (C
15H
17N
7O
5S
3) in the
Standard preparation; M is the quantity, in mg, of Cefmetazole Sodium taken to prepare the
Assay preparation; and
r U and
r S are the cefmetazole peak responses obtained from the
Assay preparation and the
Standard preparation, respectively.