title: DC polarography of cephradine and its application to capsules.
abstract: A polarographic method has been developed for the quantitative analysis of cephradine and its dosage forms. Direct determinations on capsules are carried out; excipients and coloring matter do not interfere in the determination. The electroactive product is formed by acidic hydrolysis with 5.0N HCl and heating at 80 degrees C for 60 min. Two polarographic waves are obtained: I = -0.46 V and II = -0.78 v vs. SCE. Both reduction waves are diffusion controlled. Wave I is preferred for analytical purposes. The precise chemical identity of the electroactive product has not been determined, but UV spectral data and the TLC Rf value are reported. A linear relation is established for levels of cephradine between 10(-2) and 10(-5)M in 5.0N HCl.
mesh_terms: D002214:Capsules / Q000032:analysis; D002511:Cephalosporins / Q000032:analysis*; D002515:Cephradine / Q000032:analysis*; D011048:Polarography / Q000379:methods
chemical_list: D002214:Capsules; D002511:Cephalosporins; D002515:Cephradine