Selective detection of dopamine in the presence of ascorbic acid and uric acid by a carbon nanotubes-ionic liquid gel modified electrode

Simultaneous voltammetric determination of dopamine and ascorbic acid using multivariate calibration methodology performed on a carbon paste electrode modified by a mer-[RuCl3(dppb)(4-pic)] complex

“…Furthermore, oxidized DA mediates AA oxidation and the electrode surface can be easily fouled by the product of AA oxidation. In order to distinguish between DA and AA, various methods to prepare electrodes have been developed, as modified carbon nanotubes, 15,16 sol-gel composites, 17 selfassembled monolayers, 18 polymer films, 19 modified carbon pastes 20 and electrochemically pretreated glassy carbon electrodes. 21 Carbon-based electrodes have been used to study the electrochemical oxidation of DA because noble metal electrodes are easily contaminated.…”

Electrocatalytic properties of prussian blue nanoparticles supported on poly(m-aminobenzenesulphonic acid)-functionalised single-walled carbon nanotubes towards the detection of dopamine

“…They are essential and promising materials in the field of nano-science and nanotechnology because of their electronic properties and large surface area [1][2][3]. Their contribution to the improvement of electrical properties of some bare electrode such as the glassy carbon [4][5][6], graphite [7][8][9][10], carbon fiber [11], gold [12][13][14][15], and platinum (Pt) electrodes [16] have been reported. As part of its numerous applications, Han et al [17] considered CNTs as suitable mediators for prussian blue (PB)-modified electrodes because of their good electrical conductivity and the property of being particle carriers.…”

Electrochemical sensors based on carbon nanotubes and their use in biomedical research.Part 2: sensors manufactured by dispersion of carbon nanotubes by means of polyethyleneimine, organic dyes, cyclodextrins, chitosan, proteins, room-temperature ionic liquids, gels, and thiols. Sensors manufactured by dispersion of carbon nanotubes by electropolymerization process. sensors manufactured by dispersion of carbon nanotubes by layer-by-layer deposition

“…Технологии изготовления электрохимических сенсоров путём нанесения углеродных нанотрубок на рабочую поверхность электрода с помощью полиэтиленимина [2][3][4][5][6][7], органических красителей [9,[11][12][13] и циклодекстринов [14][15][16][17] схожи между собой: нанотрубки распределяются в растворах перечисленных химических соединений, образуя гомогенную суспензию, которая далее наносится на поверхность электрода с последующим высыханием. Хитозан [18][19][20][21][22], белковые соединения [23,24], ионные жидкости [25,26], гели [27,28] и тиолы [29][30][31] также могут использоваться для нанесения углеродных нанотрубок на рабочую поверхность стеклоуглеродного, золотого или др. электрода.…”

“…В итоге, присутствие в анализировавшихся пробах высоких содержаний аскорбиновой и мочевой кислоты практически не сказывалось на результатах определения дофамина. Сигнал окисления этого химического соединения линейно зависел от его концентрации в диапазоне от 1×10 -6 до 1×10 -4 моль/л, а предел обнаружения оценивался на уровне 1×10 -7 моль/л [26].…”