| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 440.34 KB | Adobe PDF |
Orientador(es)
Resumo(s)
Detection and quantification of cocaine is a key tool
in fields such as police apprehensions and the fight against
drug trafficking. Thus, a simple, fast and inexpensive electroanalytical
methodology for the determination of cocaine in
seized street samples has been developed, employing linear
sweep voltammetry. The method is based on the use of a
glassy carbon (GC) electrode modified by a combination of
multi-walled carbon nanotubes (MWCNT) with β-
cyclodextrin (β-CD) incorporated in a polyaniline film. The
proposed method shows high reproducibility, repeatability
and specificity. Under optimal conditions, the β-CD/
MWCNT-modified GC electrode gives a detection limit of
1.02 μM cocaine. The results obtained are in good agreement
with those obtained by the high-performance liquid chromatography
reference method. The new methodology proposed
has excellent potential as the basis of a portable analytical
sensor for on-site screening of cocaine in seized street
samples.
Descrição
Palavras-chave
Illicit drugs Cocaine Voltammetric sensor β-cyclodextrin Carbon nanotubes
Contexto Educativo
Citação
Editora
Springer Verlag