Open AccessDot Microsensors Based on Zinc Porphyrins and Zinc Phthalocyanine for the Determination of Indigo Carmine
Author(s) -
Raluca Ioana Ștefan-van Staden,
Jacobus Frederick van Staden
Publication year - 2020
Publication title -
ecs journal of solid state science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.488
H-Index - 51
eISSN - 2162-8777
pISSN - 2162-8769
DOI - 10.1149/2162-8777/ab902e
Subject(s) - indigo carmine , zinc , materials science , differential pulse voltammetry , voltammetry , microelectrode , nuclear chemistry , nanotechnology , cyclic voltammetry , metallurgy , chemistry , electrochemistry , electrode
Eight microelectrodes based on carbon and diamond paste modified with zinc complexes with: tetraphenylporphyrin (ZnTPP), tetranaphtoporphyrin (ZnTNP), tetrasulphophenylporphyrin (ZnTSPP) and phtalocyanine (ZnPc), were proposed for the assay of indigo carmine in wastewaters, pharmaceutical formulations and biological samples. All measurements were performed using differential pulse voltammetry. Indigo carmine was recovered reliable from real samples in percentages higher than 90.00%. The surface of the microelectrodes can easily be renewed by simple polishing, obtaining a fresh surface ready for use in a new assay.