Assay preparation
Pipet 2.0mLof Injection into a 25-mLvolumetric flask,dilute with 0.25%glacial acetic acid to volume,and mix.Calculate the potency,in USP Vasopressin Units per mL,by the formula:
C(rU/rS),
in which
Cis the concentration,in USP Vasopressin Units per mL,of the
Standard preparation;and
rUand
rSare the mean values of the peak responses obtained from the
Assay preparationand the
Standard preparation,respectively.