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metadata.artigo.dc.title: Voltammetric determination of Δ 9-THC in glassy carbon electrode: an important contribution to forensic electroanalysis
metadata.artigo.dc.creator: Balbino, Marco Antonio
Teles de Menezes, Matheus Manoel
Eleoterio, Izabel Cristina
Saczk, Adelir Aparecida
Okumura, Leonardo Luiz
Tristao, Heloisa Maria
Oliveira, Marcelo Firmino
metadata.artigo.dc.subject: Tetrahydrocannabinol
Forensic electroanalysis
metadata.artigo.dc.publisher: Elsevier Science 14-Jun-2016
metadata.artigo.dc.identifier.citation: BALBINO, M. A. et al. Voltammetric determination of Δ 9-THC in glassy carbon electrode: an important contribution to forensic electroanalysis. Forensic Science International, Lausanne, v. 221, n. 1/3, p. 29–32, Sept. 2012.
metadata.artigo.dc.description.abstract: A new voltammetric method for the determination of Delta(9)-tetrahydrocannabinol (Delta(9)-THC) is described. The voltammetric experiments were accomplished in N-N dimethylformamide/water (9: 1, v/v), using tetrabutylammonium tetrafluoroborate (TBATFB) 0.1 mol/L as supporting electrolyte and a glassy carbon disk electrode as the working electrode. The anodic peak current was observed at 0.0 V (vs. Ag/AgCl) after a 30 s pre-concentration step under an applied potential of -1.2 V (vs. Ag/AgCl). A linear dependence of Delta(9)-THC detection was obtained in the concentration range 2.4-11.3 ng/mL, with a linear correlation coefficient of 0.999 and a detection limit of 0.34 ng/mL. The voltammetric method was used to measure the content of Delta(9)-THC in samples (hemp and hashish) confiscated by the police. The elimination of chemical interferences from the samples was promptly achieved through prior purification using the TLC technique, by employing methanol/water (4: 1, v/v) as the mobile phase. The results showed excellent correlation with results attained by HPLC.
metadata.artigo.dc.language: pt_BR
Appears in Collections:DQI - Artigos publicados em periódicos

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