Use of screen-printed electrodes for quantification of cocaine and Δ​9-THC: adaptions to portable systems for forensic purposes

Autor: Izabel Cristina Eleotério, Marco Antonio Balbino, Érica Naomi Oiye, José Wilmo da Cruz Júnior, Antonio José Ipólito, Maria Fernanda Muzetti Ribeiro, Marcelo Firmino de Oliveira
Rok vydání: 2016
Předmět:
Zdroj: Journal of Solid State Electrochemistry. 20:2435-2443
ISSN: 1433-0768
1432-8488
Popis: The worldwide attention for illicit drug consumption is known, mainly cocaine and marijuana, which were the most commonly apprehended drugs. In this study, we adapted conventional systems for voltammetric analysis for identifying these drugs using screen-printed electrode (SPE) devices in a portable potentiostat. For cocaine determination, a commercial platinum screen-printed electrode (Pt-SPE) with a cobalt hexacyanoferrate film (CoHCFe) presented the best results in comparison to other available models, and for Δ9-tetrahydrocannabinol (Δ9-THC), no chemical modification was required on the carbon screen-printed electrodes (C-SPEs). The results allowed the use of the adapted systems with good analytical parameters: cocaine and Δ​9-THC determination presented a sensibility equal to 2.02 × 10−2 and 2.65 × 10−7 A L mol−1 , respectively. Finally, the developed procedures showed an application for electrochemical analysis in forensic context, besides the results obtained to comply with reliable results which forensic analysis must have.
Databáze: OpenAIRE
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