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Ok, so there could be an error in the test or the level they've chosen is wrong. Of these, only the error in the test is a source of nuance - the level they have to abide by is known (and the day an athlete needs a dose of a controlled substance is excess of what is allowed is the day he takes his numbers off).
Does the margin of error cover a result double over their limit ?
Not a facetious question, I've got no idea.
christianSpaceman-
As I understand it, it is more nuanced:
There is a maximum permitted dose which an athlete may not exceed. To test for this, they have applied a maximum concentration limit in tested urine. However, if that concentration is exceeded in the urine it will not be a "fail" if they can demonstrate that the concentration was achieved while still taking no more than the maximum dose.I also have no idea if being double over the limit is feasible, but many have pointed to some major misgivings about how accurately you can predict how salbutamol makes its way into urine.
Scrabble
The nuance is covered in this post: https://www.lfgss.com/comments/14005585/