The World Anti-doping Agency (WADA) has given the seal of approval to the doping laboratory that would be processing more than 6,000 samples at the London Olympics.

The London 2012 organizing committee has vowed to leave no stone unturned to catch drug cheats at the London Olympics and it would be conducting its anti-doping operation at a sprawling site owned by chemical giant GlaxoSmithKline.

Mario Thevis, a German researcher, told delegates at a conference in London convened by World Sports Law Report that up to 100 new performance enhancing drugs could not be detected by current tests. Thevis said these performance-enhancing drugs act like EPO (erythropoietin) but these drugs are structurally different and therefore they cannot be picked up by the present-day EPO tests.

One in two competitors will be tested during the Games and by 150 highly-trained technicians supplied by King’s College London.