Modern analytical techniques can measure the atomic weight of elements quite precisely, which can provide a number of practical applications, such as anti-doping campaigns in athletics.Performance-enhancing testosterone can be identified in the body of an athlete because the atomic weight of carbon in natural human testosterone is higher than in pharmaceutical testosterone.
... it can be used to help detect food adulteration by looking at the carbon in the sugar to see if a product has been artificially sweetened or it can track the source of pollutants.
From Atomic Weight of 11 Elements on What Was a Constant Periodic Table Are Changing by , December 14, 2010 at Yahoo! News.
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