Development and verification of a pre-column derivative reversedphase high performance liquid chromatography for determination of free formaldehyde content in adsorbed acellular DPT vaccine
Objective To develop and verify a pre-column derivative reversed-phase high performance liquid chromatography(HPLC)for determination of free formaldehyde content in adsorbed acellular DTP vaccine. Methods ZORBAX Eclipse XDB-C18 column(4. 6 mm × 250 mm, 5 μm) was used, serving 2, 4- dinitrophenylhydrazine(DNPH) as a derivative agent, and 70% acetonitrile solution as mobile phase for isocratic elution at a flow rate of 1 ml / min. The wavelength for detection was 360 nm, while the sample loading was 10 μl. Th...