Liquid chromatography/electrochemical detection of phenols at a Poly[Ni-(Protoporphyrin IX)] chemically modified electrode

Electrocatalytic detection of phenolic estrogenic compounds at NiTPPS|carbon nanotube composite electrodes

“…Various novel materials were thereby immobilized on an electrode surface to minimize electrode fouling and to improve its analytical performance in detecting phenolic estrogenic compounds [2,[14][15][16]. Among these electrode materials, transition metalloporphyrin compounds can be easily modified on the surface of electrodes and they have been demonstrated to be efficient catalysts for chemical and analytical applications [17][18][19]. For example, Trevin et al [19] exploited a Ni(II)tetrakis(4-sulfonatophenyl) porphyrin (NiTPPS)-modified electrode as an efficient material for the electrocatalytic oxidation of methanol, ethanol and hydrazine.…”

Derivative voltammetric direct simultaneous determination of nitrophenol isomers at a carbon nanotube modified electrode

“…At present, flow-injection analysis, spectrophotometric method, high performance liquid chromatography and capillary electrophoresis have been the most attractive and are thus in wide use [4][5][6][7][8][9]. Electrochemical methods have also been applied for the determination of one or two NP isomers [10][11][12][13][14][15][16], but few reports concerns simultaneous determination of these three isomers [17,18].…”

Voltammetric investigation of hair dye constituents: application to the quantification of p-phenylenediamine

“…The multi-ingredient composition of hair dyes poses a problem to the analytical chemist and as such its determination is often reliant upon separation techniques. Although the determination of PPD in hair dyes has been achieved by gas chromatography, 11,18 capillary electrophoresis 19 and mass spectrometry, 18 its detection has been mostly based on high performance liquid chromatography (HPLC), [20][21][22][23][24][25][26][27] in conjunction with diode array, 20 UV, 21,22 chemiluminescence, 23 fluorescence 22 and electrochemical detection. 22,24,25 The aim of this work was to investigate the applicability of direct electroanalysis as a means of producing a facile route through which the PPD concentration in hair dye formulations can be monitored.…”