Stability-indicating liquid chromatographic determination of cephapirin, desacetyl cephapirin and cephapirin lactone in sodium cephapirin bulk and injectable formulations.
A specific, stability-indicating, high-performance liquid chromatographic assay was developed for the determination of cephapirin, desacetyl cephapirin and cephapirin lactone in sodium cephapirin (cefadyl) bulk and injectables. The procedure uses a muBondapak C18 column and a mobile phase of dimethylformamide-acetic acid-potassium hydroxide in water. UV detection at 254 nm is used for quantitation with acetanilide used as the internal standard. The assay is precise, accurate and linear over the range of 100-300 micrograms/ml for cephapirin and over the range of 2-6 micrograms/ml for desacetyl cephapirin and cephapirin lactone. The assay is also stability-indicating for the described thermal, acid, base, aqueous and accelerated light degradations.
D002511:Cephalosporins / Q000032:analysis*; D002514:Cephapirin / Q000031:analogs & derivatives / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D004340:Drug Contamination; D004355:Drug Stability; D007267:Injections; D013056:Spectrophotometry, Ultraviolet
D002511:Cephalosporins; C049806:cephapirin lactone; D002514:Cephapirin; C049805:desacetyl cephapirin