Not official USP-NF text
ESTRADIOL BENZOATE
PF LGS# Brand Type of Test Additional Information
33(2) L1 Ultrasphere ODS Assay Analytical column: 4.6 mm x 25 cm, 5 µm. Guard column: same phase, 4.6 mm x 4.5 cm, 5 µm.
33(2) S3 Porapak Q Limit of . . . . . . . . . Limit of methanol and methylene chloride. 3.2 mm x 1.8 m.