Distribution of caffeine levels in urine in different sports in relation to doping control before and after the removal of caffeine from the WADA doping list.
期刊名称： International Journal of Sports Medicine
作者： Van Thuyne, W.,Delbeke, F.
年份： 2006年
期号： 第09期
关键词： Sport;power lifting;cycling;doping analysis
摘要：Caffeine concentrations were measured in the urine of 4633 athletes
tested for doping control in the Ghent Doping Control Laboratory in 2004. Determination of the 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). T
he method was validated according to ISO 17 025 sta锡纸烫发型
ndards (Internationa元旦主持词
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isation). Quantification was done by using a linear calibration curve in the range from 0 to 20 g/ml. The limit of quantification (LOQ) wa葡萄酒酿造
s 0.10 g/ml. Becau the results were not normally distributed, transformation of the data was done to evaluate th怎么改微信密码
e difference in detected concentrations in veral sports. This resulted in an overall average concentration of 1.12
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