Improved sensing of capsaicin with TiO2 nanoparticles modified epoxy graphite electrode
Sarma, Munmi (Universitat Autònoma de Barcelona. Departament de Química)
Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Departament de Química)

Data:	2020
Descripció:	8 pàg.
Resum:	The presented research focuses on the electrochemical determination of capsaicin, a lipophilic alkaloid which originates hotness in chili peppers. An electrochemical sensor based on epoxy-graphite composite with the modification of titanium dioxide (TiO2) nanoparticles is developed for the determination of this alkaloid. The measurements were carried out in glycine buffer at pH 2. 5 using cyclic voltammetry. Two linear concentration ranges were obtained from 6 to 75 μM (R=0. 99) and from 12 to 138 μM, with a detection limit of 5. 34 μM and 11. 3 μM capsaicin, for 1st and 2nd oxidation peak, respectively. The main advantage of developed sensor is its repeatability and robustness against fouling; the relative standard deviation (RSD) value was 2. 53 % (n=10). This voltammetric sensing procedure has successfully been applied to quantify capsaicin in various real samples such as hot chili sauce and pharmaceutical preparations.
Ajuts:	Ministerio de Economía y Competitividad CTQ2016-80170-P
Nota:	Altres ajuts: M. S. thanks to AGAUR, Generalitat de Catalunya and to European Social Fund, European Union for FI fellowship. M. d. V. thanks the support from program ICREA Academia.
Drets:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Llengua:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Matèria:	Analgesic ; Capsaicin ; Cream ; Cyclic voltammetry ; Hot pepper sauce ; TiO nanoparticles
Publicat a:	Electroanalysis, Vol. 32, issue 2 (Feb. 2020) , p. 230-237, ISSN 1521-4109

DOI: 10.1002/elan.201900400

Preprint 13 p, 943.9 KB

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