Determination of the origin of urinary norandrosterone traces by gas chromatography combustion isotope ratio mass spectrometry

Chemistry

• 19-Norandrosterone 100%
• Gas Chromatography 44%
• Concentration 44%
• Doping 44%
• Androsterone 33%
• Steroid 22%
• Isotope Ratio Mass Spectrometry 22%
• Sample 22%
• Metabolite 11%
• Demethylation 11%
• High Performance Liquid Chromatography 11%
• Anabolic Steroid 11%
• Prohormone 11%
• Analytical Method 11%
• Amount 11%
• Procedure 11%
• Synthesis (Chemical) 11%

Pharmacology, Toxicology and Pharmaceutical Science

• Doping 44%
• Androsterone 33%
• Nandrolone 33%
• Steroids 22%
• Isotope 22%
• Anabolic Steroid 11%
• Etiocholanolone 11%
• Hormone Precursor 11%
• High Performance Liquid Chromatography 11%

Biochemistry, Genetics and Molecular Biology

• Quality Control 11%