NIST Researchers to Test New Approach for Detecting Cannabis in Breath
 With cannabis now outpacing alcohol as Americans’ daily drug of choice, there is a critical need for a scientifically validated breath test to detect the recent use of the substance in drivers.
But developing such a breath test has proved a significant challenge.
Last year, researchers at the National Institute of Standards and Technology (NIST) and the University of Colorado Boulder found that a single breath test may not be reliable in detecting recent cannabis use because cannabis can linger in the body for weeks, making it difficult to distinguish between past and present use.
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