Distribution of caffeine levels in urine in different sports in relation to doping control.

@article{Thuyne2005DistributionOC,
  title={Distribution of caffeine levels in urine in different sports in relation to doping control.},
  author={Wim Van Thuyne and Kris Roels and Frans T Delbeke},
  journal={International journal of sports medicine},
  year={2005},
  volume={26 9},
  pages={714-8}
}
Caffeine concentrations were measured in the urines of 11 361 athletes tested for doping control in the Ghent doping control laboratory during the period 1993 - 2002. Determination of these concentrations was done using an alkaline extraction with a mixture of dichloromethane and methanol (9:1; v/v) followed by high performance liquid chromatography and ultraviolet detection (HPLC-UV). The method was validated according to ISO 17 025 standards (International Organisation for Standardisation… CONTINUE READING
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