2134/19040
Danilo Russo
Danilo
Russo
Danilo Spasiano
Danilo
Spasiano
Marianna Vaccaro
Marianna
Vaccaro
Roberto Andreozzi
Roberto
Andreozzi
Gianluca Li-Puma
Gianluca
Li-Puma
Nuno Reis
Nuno
Reis
Raffaele Marotta
Raffaele
Marotta
Direct photolysis of benzoylecgonine under UV irradiation at 254nm in a continuous flow microcapillary array photoreactor
Loughborough University
2015
Microcapillary film
Photoreactor
Photolysis
Caffeine
Benzoylecgonine
Cocaine metabolite
Water reuse
Chemical Engineering not elsewhere classified
2015-10-15 12:32:26
Journal contribution
https://repository.lboro.ac.uk/articles/journal_contribution/Direct_photolysis_of_benzoylecgonine_under_UV_irradiation_at_254nm_in_a_continuous_flow_microcapillary_array_photoreactor/9243275
Benzoylecgonine (BE) is the major metabolite of cocaine and a contaminant of emerging concern often detected in sewage treatment plant (STP) effluents and surface waters. In this study, an innovative microcapillary film (MCF) array photoreactor made of fluoropolymer material was used to determine the direct photolysis quantum yield of benzoylecgonine at 254 nm. The quantum yield of BE was found to be (6.22 ± 0.19) × 10-3 mol ein-1. The proposed methodology was validated by estimating the quantum yield of caffeine (7.48 10-4 ± 0.64) × 10-4 mol ein-1, which was found in agreement with results published in literature. The MCF uses a very small sample volume (in the order of 330μl per meter length of material) and allows extremely rapid photolysis with a short contact time ranging from a fraction of seconds to a few minutes. This new microfluidics approach presented in this study is particularly useful for determining the photochemical behavior of highly priced pharmaceuticals, illicit drugs, metabolites and uncommon or regulated substances.