Highly selective and sensitive voltammetric sensor based on modified multiwall carbon nanotube paste electrode for simultaneous determination of ascorbic acid, acetaminophen and tryptophan

Poly(thionine)-carbon nanotube modified carbon film electrodes and application to the simultaneous determination of acetaminophen and dipyrone

“…Both acetaminophen and dipyrone are electroactive, so that different electrochemical methods have been used for their detection [10][11][12][13]. In relation to determination at electrodes modified with CNT, there is only one study on the determination of dipyrone at a CNT-modified graphite-epoxy resin composite electrode, GrCE [14] and for acetaminophen; most of the recent work is based on carbon nanotube paste electrodes (CNTPE) [15][16][17][18][19][20]. In other studies, CNT were used together with metallic nanoparticles [20][21][22], magnetic microparticles [11] or graphene [23]; ordered mesoporous carbon [24] has been also used as electrocatalyst.…”

“…In other studies, CNT were used together with metallic nanoparticles [20][21][22], magnetic microparticles [11] or graphene [23]; ordered mesoporous carbon [24] has been also used as electrocatalyst. Only a few reports concern incorporation of redox mediators with CNT [10,16,18,19,21]. Poly(thionine) together with carbon nanotubes has been used in sensors for other biological compounds [25][26][27], although, to our knowledge, it has not yet been used in the determination of either acetaminophen or dipyrone.…”

Electrochemical detection of l-serine and l-phenylalanine at bamboo charcoal–carbon nanosphere electrode

“…In recent years, electrochemical detection has gained prominence as a sensitive and selective detection technique for the electroactive compounds. Various electroanalytical methods and sensors for the detection of amino acids have been reported [10][11][12][13][14].…”

Voltammetric determination of hydroxylamine in water and waste water samples using a NiO nanoparticle/new catechol derivative modified carbon paste electrode

“…A further advantage of chemically modified electrodes is that they are less prone to surface fouling and oxide formation, compared to inert substrate electrodes [12][13][14]. A wide variety of compounds have been used as electron transfer mediators for the modification of electrode surfaces in various procedures [15][16][17].…”