Systematic analysis of stimulants and narcotic analgesics by gas chromatography with nitrogen specific detection and mass spectrometry

Abstract

The recovery data of 40 doping agents from human urine were evaluated. Retention data were standardized by the calculation of relative retention times using N, N-dlisopropyl-n-dodecane as the internal standard. The relative standard deviations of retention times were less than 0.5% for the within batch analyses and less than 0.8% for the day-to-day analyses. Good recoveries (> 70%) were observed for most of the drugs. ？ 1990 Oxford University Press.