Flow injection amperometric detection of ascorbic acid using a Prussian Blue film-modified electrode

Castro, Sonia

doi:10.1016/s0039-9140(01)00407-6

Cited by 89 publications

(76 citation statements)

References 18 publications

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“…Stradiotto and co-workers 107 have reported a new way of modifying an electrode by combining vanadium pentoxide xerogel and a cationic surfactant able to detect anions, such as penatcyanonitrosylferrate (II) and hexacyanoferrate (III). Thin films of materials such as Prussian blue and related materials can be formed on the electrode surface and show interesting properties.…”

Section: Chemically Modified Electrodesmentioning

confidence: 99%

“…Thin films of materials such as Prussian blue and related materials can be formed on the electrode surface and show interesting properties. 102,[107][108][109][110] Mattos and Gorton 110 have shown that glucose biosensors can be constructed using Prussian blue films, with excellent performance. An example from Stradiotto and coworkers 101,102 of the use of Prussian blue films as an amperometric sensor to determine persulfate anions in hair bleach "booster" is shown in Figure 2.…”

Section: Chemically Modified Electrodesmentioning

confidence: 99%

“…It is possible to employ many types, from mercury drop electrodes to carbonfiber microelectrodes, unmodified or with a modified surface capable of having electrocatalytic or preconcentration properties. A typical flow injection analysis of ascorbic acid in pharmaceutical compounds using amperometric detection with electrodes modified with Prussian blue films was developed by Stradiotto and co-workers, 179 which are illustrated in Figure 5.…”

Section: Automated Flow Systemsmentioning

confidence: 99%

“…The analytical capability of these detectors can be enhanced using surface modification and/or electrochemical procedures to increase the selectivity of the amperometric sensor or by using more than one working electrode operating simultaneously at different potentials using parallel detection. 179,180 The power of electrochemical detection applied to capillary electrophoresis is also reviewed by Silva. 181 …”

Section: Automated Flow Systemsmentioning

confidence: 99%

See 3 more Smart Citations

Electrochemical sensors: a powerful tool in analytical chemistry

Stradiotto¹,

Yamanaka²,

Zanoni³

2003

J. Braz. Chem. Soc.

327

154

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Sensores potenciométricos, amperométricos e condutométricos são sensores eletroquímicos com imensa aplicação nas áreas de meio ambiente, indústria e análises clínicas. O presente trabalho apresenta uma revisão generalizada dos aspectos fundamentais, os desenvolvimento e a contribuição destes sensores na área de química analítica, e reporta alguns aspectos relevantes dos avanços na área de sensores eletroquímicos no Brasil.Potentiometric, amperometric and conductometric electrochemical sensors have found a number of interesting applications in the areas of environmental, industrial, and clinical analyses. This review presents a general overview of the three main types of electrochemical sensors, describing fundamental aspects, developments and their contribution to the area of analytical chemistry, relating relevant aspects of the development of electrochemical sensors in Brazil.

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Section: Chemically Modified Electrodesmentioning

confidence: 99%

Section: Chemically Modified Electrodesmentioning

confidence: 99%

Section: Automated Flow Systemsmentioning

confidence: 99%

Section: Automated Flow Systemsmentioning

confidence: 99%

See 2 more Smart Citations

Electrochemical sensors: a powerful tool in analytical chemistry

Stradiotto¹,

Yamanaka²,

Zanoni³

2003

J. Braz. Chem. Soc.

327

154

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“…The calculated value is higher than others reported in the literature. 6,9,10,12,13,16,34,35 This was expected, since we used a pre-concentration step and higher deposition times, a total of 6 min during 3 deposition steps.From Figure 1 it is also possible to see that no peaks were recorded, with an unmodified carbon paste electrode, in the same potential range from -0.4 V to + 0.6 V. It is possible that rhodium (III) can form binuclear species (Rh 2 O 6 3+ …”

mentioning

confidence: 90%

Rhodium-Prussian Blue modified carbon paste electrode (Rh-PBMCPE) for amperometric detection of hydrogen peroxide

Ivama¹,

Serrano²

2003

J. Braz. Chem. Soc.

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Filmes de azul da Prússia foram superficialmente depositados em eletrodos de pasta de carbono a partir de soluções contendo 2,0 x 10 -3 mol L -1 de K 3 [Fe(CN) 6 ], 3,0 x 10 -3 mol L -1 FeCl 3 e 1,0 x 10 -2 mol L -1 HCl, usando dois potenciais controlados. Para aumentar a estabilidade do eletrodo modificado, efetuaram-se 50 ciclos em solução contendo 1,0 x 10 -3 mol L -1 de RhCl 3 , 0,50 mol L -1 de KCl e 1,0 x 10 -2 mol L -1 de HCl no intervalo de -0,40 a + 0,60 V a 60 mVs -1 . Estes eletrodos, denominados de Rh-PBMCPE, apresentaram boa estabilidade durante a determinação amperométrica de H 2 O 2 a 0,040 V sem a interferência dos ácidos ascórbico e úrico. A corrente de redução variou linearmente com a concentração de H 2 O 2 no intervalo de 5,0 x 10 -5 a 8,6 x 10 -4 mol L -1 . O limite de detecção foi de 2,8 x 10 -5 mol L -1 com sensibilidade variando de 1,32 a 0,96 A mol -1 L cm -2 ao longo de cinco dias (180 determinações).Prussian Blue was deposited at carbon paste electrode surface from a solution containing 2.0 x 10 -3 mol L -1 K 3 [Fe(CN) 6 ], 3.0 x 10 -3 mol L -1 FeCl 3 and 1.0 x 10 -2 mol L -1 HCl using two controlled potentials. To improve the stability of the modified electrode it was 50 times cycled in a solution containing 1.0 x 10 -3 mol L -1 RhCl 3 , 0.50 mol L -1 KCl and 0.010 mol L -1 HCl in the potential range from -0.40 V to 0.60 V at 60 mV s -1 . The Rh -Prussian Blue carbon paste modified electrode (Rh-PBMCPE) showed good stability during amperometric catalytic determination of H 2 O 2 at 0.040 V, without ascorbic and uric acids interferences. The current changed linearly with H 2 O 2 concentrations in the range of 5.0 x 10 -5 -8.6 x 10 -4 mol L -1. The estimated detection limit was 2.8 x 10 -5 mol L -1 with sensibility changing from 1.32 to 0.96 A mol -1 L cm -2 along five days (180 determinations).Keywords: prussian blue, rhodium, carbon paste electrode, hydrogen peroxide, amperometry IntroductionPrussian Blue modified electrodes (PBME) have been prepared by electrochemical techniques on electrodes such as glassy carbon, 1-18 platinum, 1,3,19,[20][21][22][23] tin oxide, 1,3,[24][25][26] gold, 3 graphite, 27-28 titanium-silver-gold arrays, 29 basal pyrolytic graphite, 30 screen printed carbon ink interdigital arrays, 20 conducting polymer coated microelectrode arrays, 31 carbon fiber, 32 carbon paste, 33 etc.They were used to design new glucose, [8][9][10]17,21,23,28,30,32 alanine, 30 alcohol 30 and glutamate 13,14 biosensors based on the electrochemical detection of hydrogen peroxide, which is formed in the course of the substrate enzyme-catalyzed oxidation. In these cases Nafion, 8,10,14,17,30 poly (ophenylenediamine), 21 polypyrrole/poly (o-phenylenediamine) 23 and poly (o-diaminebenzene) 18 polymers have been used to immobilize the enzyme and eliminate interferences from ascorbic and uric acids. Chemical preparations were also described and involve the immersion of the working electrode in aqueous modifier solution, 5,6,19 the mixture of Prussian Blue (chemically synthesized) with gra...

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Design of a nanostructured electromagnetic polyaniline–keggin iron–clay composite modified electrochemical sensor for the nanomolar detection of ascorbic acid

Lilly

Devaki

Narayanan

et al. 2014

J of Applied Polymer Sci

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This article demonstrates the design and fabrication of an electrochemical sensor based on a platinum electrode for ascorbic acid (AA) modified by an electromagnetic polyaniline–Keggin iron–clay (PPICS) composite. The polyaniline–polyhydroxy iron–clay composite was prepared by the polymerization of [Anilinium]+[PDPSA]− in the presence of Keggin iron intercalated clay and was characterized for its particle size, morphology, electrical conductivity, and saturation magnetization. The oxidation potential of AA was observed at +0.4 V on the bare electrode and shifted to a negative potential of −0.32 V on the modified electrode. Common possible interferences of the sample matrices were tested, and the results reveal that the PPICS‐modified electrode exhibited a high selectivity and sensitivity toward AA. This unique low‐cost and user‐friendly sensor was validated for the nanomolar detection of AA present in real samples. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40936.

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Flow injection amperometric detection of ascorbic acid using a Prussian Blue film-modified electrode

Cited by 89 publications

References 18 publications

Electrochemical sensors: a powerful tool in analytical chemistry

Electrochemical sensors: a powerful tool in analytical chemistry

Rhodium-Prussian Blue modified carbon paste electrode (Rh-PBMCPE) for amperometric detection of hydrogen peroxide

Design of a nanostructured electromagnetic polyaniline–keggin iron–clay composite modified electrochemical sensor for the nanomolar detection of ascorbic acid

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