USP Methods for the Analysis of Ibuprofen using a Legacy L1 Column

Application Notes: Ibuprofen is the most commonly used analgesic. It is a vasoconstrictor and fever reducer. According to the USP methods, ibuprofen contains no less than 97% and no more than 103% ibuprofen based on a dried basis. The USP HPLC method for the separation of procainamide was developed on Legacy L1 column according to the US Pharmacopeia methodology. L1 classification is assigned to reversed-phase HPLC column containing Ci18 ligand. Support for the material is spherical silica gel with particles size 3-10 um and pore size of 100-120A. Resolution between critical pairs corresponds to rules and specifications of USP. Application Columns: Legacy L1 C18 HPLC column Application compounds: Ibuprofen and benzophenone Mobile phase: .01M H3PO4/MeCN (55/45) Detection technique: UV Reference: USP35: NF30


Column Legacy L1, 4.6x150 mm, 5 µm, 100A
Mobile Phase MeOH/H2O - 45/55%
Buffer H3PO4
Flow Rate 1.5 ml/min
Detection UV, 230 nm


Class of Compounds Drug, Nonsteroidal anti-inflammatory drug, Hydrophobic, Ionizable, Neutral
Analyzing Compounds Ibuprofen, benzophenone
Application Analytes: