Photochemical sensing of THC and nitazenes. From Figure , the majority of non-SC containing e-cigarettes/e-liquids submitted for drug checking contained THC. Also, 92 % of SC-containing e-cigarettes were purchased with the intent of receiving THC. E-cigarettes as a route of administration for cannabis are most popular amongst young people, where modified commercial devices are often used. Rapid detection of THC from sealed e-cigarettes and e-liquid is thus desirable in several contexts, where discrimination from SCs would provide a form of harm reduction. Therefore, we assessed the potential for specific identification of THC using the EDD. Figure shows fluorescence spectra of THC, CBD and MDMB-4en-PINACA collected in ethanol and irradiated with 265 nm LED. The emission band of CBD and THC are centered at ~300 and 310 nm, respectively. In addition, the emission spectra are structurally different, at least at the same concentration, with THC having a bi-distributed spectral maximum.