Direct injection liquid chromatography/electrospray ionization mass spectrometric horse urine analysis for the quantification and confirmation of threshold substances for doping control. II. Determination of theobromine

Citation:

Vonaparti A, Lyris E, Panderi I, Koupparis M, Georgakopoulos C. Direct injection liquid chromatography/electrospray ionization mass spectrometric horse urine analysis for the quantification and confirmation of threshold substances for doping control. II. Determination of theobromine. Rapid Communications in Mass Spectrometry [Internet]. 2009;23:1020 – 1028.