title: Analysis of ritodrine in serum by high-performance liquid chromatography with electrochemical detection.
abstract: A sensitive and specific assay for ritodrine in serum was developed using high-performance liquid chromatography (HPLC) with electrochemical detection. Serum samples were alkalinized to pH 9.4 by the addition of a sodium carbonate buffer and extracted with ethyl acetate. The extracts were evaporated to dryness and the residues were reconstituted in the HPLC mobile phase and chromatographed on a octadecylsilane reverse-phase column. The detection of ritodrine was achieved by an electrochemical detector with a glassy carbon electrode. The sensitivity was 0.2 ng for on-column injection. The extraction efficiency was 80%.
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods; D004563:Electrochemistry; D006801:Humans; D013058:Mass Spectrometry; D011412:Propanolamines / Q000097:blood*; D012312:Ritodrine / Q000097:blood*
chemical_list: D011412:Propanolamines; D012312:Ritodrine