The phototransformation of benzoylecgonine, one of the most common metabolite of the illicit cocaine drug, often found in rivers and lakes near major cities, was studied in a novel microcapillary array photoreactor. The  microphotoreactor is made by flexible, UVC transparent, microchannels (in the range from 80 to 200 micrometers in diameters) arranged in an array configuration, which allows a pseudo uniform irradiation of the aqueous solution. A high benzoylecgonine photoconversion was achieved, as a result of the very large reactor length to diameter ratio. The degradation kinetics with UVC radiation alone and in the presence of hydrogen peroxide (UVC/H2O2) were studied and modelled. Intermediate products were identified by solid-phase extraction method coupled to LC-MS-MS. A transformation mechanism of benzoylecgonine is proposed.

Phototransformation of benzoylecgonine with UVC and UVC-H<sub>2</sub>O<sub>2</sub> in a novel microcapillary array photoreactor

248th National Meeting (2014)

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Phototransformation of benzoylecgonine with UVC and UVC-H2O2 in a novel microcapillary array photoreactor

Phototransformation of benzoylecgonine with UVC and UVC-H₂O₂ in a novel microcapillary array photoreactor