Related Experiment Videos
Determination of ephedrines in urine by high-performance liquid chromatography
C Imaz1, D Carreras, R Navajas
1Laboratorio de Control del Dopaje, ICEF y D, Consejo Superior de Deportes, Madrid, Spain.
Journal of Chromatography
|February 12, 1993
Abstract:
An improved high-performance liquid chromatographic method with ultraviolet detection for the simultaneous determination of norephedrine, norpseudoephedrine, ephedrine, pseudoephedrine, methylephedrine and ethylephedrine in urine is described. The six substances were separated on a reversed-phase column with phosphate buffer-triethylamine (pH 5.5) as the mobile phase. The linearity and reproducibility were satisfactory for the levels usually found in urine (1-30 micrograms/ml).