Not official USP-NF text
THEOPHYLLINE ORAL SOLUTION
PF LGS# Brand Type of Test Additional Information
25(4) L1 MicroBondapak C18 Assay 3.9 mm x 30 cm. Alternative columns: 4.6 mm x 25 cm Partisil ODS (Whatman); 4.0 mm x 30 cm Chromegabond M C18 (ES Industries).