There’s been a new breakthrough in the development of a marijuana breathalyzer, with a study partly funded by the Justice Department showing a potential pathway for a “portable, low cost” device that looks like an inhaler for asthma, built with 3-D printed material that can detect delta-9 THC without secondary lab analysis.
The study, led by Emanuele Alves at Virginia Commonwealth University (VCU), detailed the results of experiments meant to address the current lack of a roadside impairment test for THC similar to those utilized by law enforcement for people suspected of driving under the influence of alcohol. With more states legalizing cannabis, there’s particular “need for rapid, reliable and low-cost roadside tools,” it says.
By using 3-D printed cartridges with a “Fast Blue” dye and gelatin system, the colorimetric experiments established “foundational data” that the device can be used to detect delta-9 THC, CBD and CBN “across multiple matrix systems.”
The tool was able to detect 10-100 nanograms of the cannabinoids, which could be differentiated using color-space modeling. Specifically, the tests revealed “two primary clusters,” with evidence that delta-9 THC and CBN analytes can be distinguished from CBD analytes based on color hue.
“Overall, this project established foundational data
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