When samples are collected for drug testing, they are placed in two separate containers. The A sample is used to conduct the initial test. If sample A returns a positive result, the B sample can then be tested to verify the accuracy of the results.
Because the consequences of an anti-doping violation can be career-ending for an elite athlete, the use of A and B samples is an important safeguard. When procedures used to test the A sample are flawed, the B sample provides an athlete with a chance to clear their name.
WADA Use of B Sample Drug Testing
If a urine sample is being collected, World Anti-Doping Agency (WADA) rules state that the athlete will divide their urine into the A and B bottles while saving a residual amount of urine in the sample collection container. If a blood sample is being collected, a blood collection officer (BCO) will draw blood from the athlete using two vials that will become sample A and sample B.
After the blood or urine samples are collected, the athlete will seal the bottles before they are secured and sent to a WADA-accredited laboratory. If the A sample returns an adverse analytical finding (also known as a “positive” result), the athlete can then request testing of the B sample. A charging letter should not be issued until the B sample confirms the A sample test result.
[Related: Sport Integrity Australia’s Mishandling of Peter Bol’s Case Must Be Rectified]
NCAA Use of B Sample Drug Testing
At the time of sample collection, the Doping Control Officer (DCO) or their designee will split the specimen into the A sample and the B sample in the presence of the student-athlete. If sample A returns a positive result for a banned substance, Drug Free Sport will notify the director of athletics at the student-athlete’s institution that sample B will be tested. Drug Free Sport will provide options for representation at the opening of sample B.
Before the B sample can be tested, the student-athlete, student-athlete’s representative, the institution’s representative, or the lab surrogate must certify that the barcode on sample B is correct, that the security seal has not been broken, and that there is no evidence of sample tampering. Sample B findings are then final, with no additional analysis permitted.
Do You Need to Speak With an Experienced International Anti-Doping Lawyer?
When your ability to continue competing in the sport you love is at risk, Global Sports Advocates is here to help. Attorney Paul Greene is a leader in the field of sports law and advocates for the rights of athletes who have been accused of anti-doping violations. Contact us online or call us directly at +1-207-747-5899 to schedule an initial one-hour consultation.
