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New Marijuana Breathalyzer Technology On The Way?

Researchers from the University of Pittsburgh have developed a new THC breathalyzer, but does it have real-world application?

Throughout the legalization movement, a growing concern has been marijuana users while high. This is not an alarmist worry, either. One poll found that more than half of habitual cannabis users believe they can drive while stoned. In addition, a study released by AAA reported that more than 15 million Americans have gotten behind the wheel of a car within an hour of smoking cannabis.

As more states legalize cannabis in the coming years, this will only become more of a pressing issue for law enforcement. While police have had technology to measure lawful blood-alcohol levels of drivers for years, the same can’t be said for quantifying THC levels. (THC is the cannabinoid in marijuana that induces psychoactive sensations in users.) But in response to the developing need, scientists have been hard at work to develop a so-called marijuana breathalyzer.

Tech companies in California and Canada have both raised significant funding to get their own marijuana breathalyzers off the ground in recent weeks. But it’s been researchers from the University of Pittsburgh responsible for developing and patenting a working THC breathalyzer. Using nanotechnology, a possibly intoxicated will blow into the device. Then, those air molecules will bind with carbon tubes 100,000 times smaller than a human hair, which will effectively identify the level of THC molecules.

“We used machine learning to ‘teach’ the breathalyzer to recognize the presence of THC based on the electrical current’s recovery time, even when there are other substances, like alcohol, present in the breath,” Sean Hwang, a Pitt doctoral candidate in chemistry and lead author of a written report of the device in the journal ACS Sensor, said in a press release.

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