The device consists of a universal e-cigarette adapter, a suction chamber, pumping/filtration components and optical detection elements. An e-cigarette is inserted into the universal adapter that when interfaced with the suction chamber forms an air-tight assembly. Activation of the vacuum pump via a button press draws air through these components and the inserted e-cigarette, causing actuation. Vapor is deposited on a porous filter sandwiched in a holder between the suction chamber and the e-cigarette adapter. Deposited e-liquid material is irradiated on-filter by a highpowered (80 mW) 265nm LED, temperature regulated by a fan and heat sink (Figure ). Reflectance and fluorescence components arising from filter irradiation are captured by photodiodes, with fitted bandpass (BP) filters for wavelength selection, similar to our previous report. The photodiodes are configured so that the optical path and focal lengths align with the filter holder for optimal light collection. LED irradiation is performed though a sapphire window embedded into the base of the suction chamber. The device is housed in a 3D-printed shell as shown in Figure .