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Sensitive and selective cocaine electrochemical detection using disposable sensors.
Asturias-Arribas, Laura; Alonso-Lomillo, M Asunción; Domínguez-Renedo, Olga; Arcos-Martínez, M Julia.
Afiliación
  • Asturias-Arribas L; Analytical Chemistry Department, Faculty of Sciences, University of Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain.
  • Alonso-Lomillo MA; Analytical Chemistry Department, Faculty of Sciences, University of Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain,. Electronic address: malomillo@ubu.es.
  • Domínguez-Renedo O; Analytical Chemistry Department, Faculty of Sciences, University of Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain.
  • Arcos-Martínez MJ; Analytical Chemistry Department, Faculty of Sciences, University of Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain.
Anal Chim Acta ; 834: 30-6, 2014 Jun 27.
Article en En | MEDLINE | ID: mdl-24928242
This paper describes the voltammetric determination of cocaine in presence of three different interferences that could be found in street samples using disposable sensors. The electrochemical analysis of this alkaloid can be affected by the presence of codeine, paracetamol or caffeine, whose oxidation peaks may overlap and lead to false positives. This work describes two different solutions to this problem. On one hand, the modification of disposable carbon sensors with carbon nanotubes allows the voltammetric quantification of cocaine by using ordinary least squares regressions in the concentration range from 10 to 155 µmol L(-1), with a reproducibility of 5.6% (RSD, n = 7. On the other hand, partial least squares regressions are used for the resolution of the overlapped voltammetric signals when using screen-printed carbon electrodes without any modification. Both procedures have been successfully applied to the evaluation of the purity of cocaine street samples.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Detección de Abuso de Sustancias / Cocaína / Nanotubos de Carbono / Técnicas Electroquímicas / Anestésicos Locales Tipo de estudio: Diagnostic_studies / Evaluation_studies Idioma: En Revista: Anal Chim Acta Año: 2014 Tipo del documento: Article País de afiliación: España Pais de publicación: Países Bajos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Detección de Abuso de Sustancias / Cocaína / Nanotubos de Carbono / Técnicas Electroquímicas / Anestésicos Locales Tipo de estudio: Diagnostic_studies / Evaluation_studies Idioma: En Revista: Anal Chim Acta Año: 2014 Tipo del documento: Article País de afiliación: España Pais de publicación: Países Bajos