A study done by Clinical Chemistry, concludes that THC, the main psychoactive chemical in marijuana, can be detected from a breath test. We’re familiar with police officers administering a breathalyzer to detect drunk driving. But now, according to a recent online article in the Seattle PI, this could become the case if the officer suspects impaired driving to due marijuana use. Currently, officers use a blood test to measure the amount of active THC in a person’s system. Utah has a limit of zero, along with a handful of other states, while Colorado and Washington have a 5-nanograms-per-milliliter legal limit for active THC in the body. The 5-nanograms-per-milliliter limit is supposed to be the equivalent to ‘blowing’ a .08 in a breathalyzer test for alcohol, according to the Seattle PI.
But here’s the problem: the marijuana breath test can detect the presence of marijuana, but not how much is in your system. So although it’s not likely to replace a blood test anytime soon, especially in states that have a limit other than zero, states like Utah, may soon have a new tool for detecting impaired drivers.
The full article can be read on SeattlePI.com: http://blog.seattlepi.com/marijuana/2013/10/23/research-closing-in-on-a-dui-breathalyzer-for-marijuana-but-theres-a-problem/#