title: High-performance liquid chromatography method for quantifying sphingomyelin in rat brain.
abstract: A rapid, reproducible and accurate high-performance liquid chromatographic (HPLC) method for the quantitative determination of sphingomyelin in rat brain was developed and validated using normal-phase silica gel column, acetonitrile-methanol-water (65:18:17 (v/v)) at a flow rate of 1 ml/min, isocratic elution, UV detection at 207 nm and 1,2-dimyristoyl-sn-glycero-3-phosphocholine as an internal standard. Total run time was 10.0 min. The calibration curve was linear over the range of 0.025-0.4 mg/ml sphingomyelin (R2>0.99). The intra-day coefficient of variation ranged from 1.4% to 2.2%. The average inter-day coefficient of variation over a period of 4 days was 3.1%. The practical limit of detection was 0.005 mg/ml with a quantification limit of 0.01 mg/ml.
authors: Department of Biochemistry, Faculty of Medicine, American University of Beirut, Lebanon.
authors: Diana J
authors: DJ
authors: Azzam
authors: Julnar A
authors: JA
authors: Usta
authors: Youssef
authors: Y
authors: Mouneimne
authors: Jimmy A
authors: JA
authors: El Hokayem
authors: Mohamad A
authors: MA
authors: Mikati
mesh_terms: D000818:Animals; D001923:Brain Chemistry; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004134:Dimyristoylphosphatidylcholine / Q000592:standards; D051381:Rats; D012015:Reference Standards; D012680:Sensitivity and Specificity; D013109:Sphingomyelins / Q000032:analysis*
chemical_list: D013109:Sphingomyelins; D004134:Dimyristoylphosphatidylcholine