RT info:eu-repo/semantics/article
T1 Comparison of carbon screen printed and disk electrodes in the detection of antioxidants using CoPc derivatives
A1 Rodríguez Méndez, María Luz
A1 Matemodombo, Fungisai
A1 Apetrei, Constantin
A1 Nyokong, Tebello
A1 Saja Sáez, José Antonio de
AB Cobalt phthalocyanine (CoPc) and cobalt phthalocyanine carboxylic derivatives (CoTCPc and CoOCPc) have been used as electrocatalysts for the detection of the antioxidants vanillic acid, caffeic acid, pyrogallol, and ascorbic acid on screen-printed carbon and disk electrode surfaces. The cobalt phthalocyanines were used to detect vanillic acid (with limit of detection ranging from 1.15 μM to 2.42 μM at potentials of 0.55–0.88 V vs. Ag|AgCl), caffeic acid (with limit of detection ranging from 1.17 μM to 2.20 μM at potentials of 0.30–0.81 V vs. Ag|AgCl), pyrogallol (with limit of detection ranging from 1.16 μM to 3.63 μM at potentials of 0.52–0.63 V vs. Ag|AgCl), and ascorbic acid (with limit of detection ranging from 1.16 μM to 1.58 μM at potentials of 0.34–0.46 V vs. Ag|AgCl). The kinetic studies also demonstrate diffusion-controlled processes at the electrode surface. The SPCE electrodes have better detection properties towards vanillic acid, caffeic acid, pyrogallol while the disk electrodes had better ascorbic acid detection properties as proven by kinetic studies. Both types CoPc-influenced electrodes show 100% discrimination of the antioxidants.
SN 0925-4005
YR 2012
FD 2012
LK http://uvadoc.uva.es/handle/10324/30705
UL http://uvadoc.uva.es/handle/10324/30705
LA eng
NO Sensors and Actuators B  vol. 166-167 p. 457-466
NO Producción Científica
DS UVaDOC
RD 22-dic-2024