Chemically modified electrodes in liquid chromatography detection: A review

Baldwin, Richard P.; Thomsen, Karsten N.

doi:10.1016/0039-9140(91)80004-j

Cited by 116 publications

(58 citation statements)

References 72 publications

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“…[46][47][48][49][50][51][52][53][54][55][56][57] Chemically modified electrodes (CME) result from a deliberate immobilization of a modifier agent onto the electrode surface though chemical reactions, chemisorption, composite formation or polymer coating. Compared to conventional electrodes, greater control of electrode characteristics and reactivity is achieved by surface modificaton, since the immobilization transfers the physicochemical properties of the modifier to the electrode surface.…”

Section: Chemically Modified Electrodesmentioning

confidence: 99%

“…Such steps can impart higher selectivity, detectability and stability to amperometric devices, which have been extensively reviewed. 39,[52][53][54]58,59 One of the common approaches for incorporating a modifier onto the surface has been coverage with an appropriate polymer film. Most polymers are applied to electrode surfaces by a combination of adsorptive attraction and low solubility in the electrolyte solution, using preformed polymers or electrochemical polymerisation.…”

Section: Chemically Modified Electrodesmentioning

confidence: 99%

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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%

Electrochemical sensors: a powerful tool in analytical chemistry

Stradiotto¹,

Yamanaka²,

Zanoni³

2003

J. Braz. Chem. Soc.

327

154

View full text Add to dashboard Cite

show abstract

“…31 In addition to that, modification on the electrode surface may have fundamental demands that include selectivity and/or electron-transfer creation or catalysis of slow electrode reactions. 32 Therefore, CMEs have been used in several applications such as electroanalysis, 33 molecular electronics, 34 electrochromic display devices, 35 chemical sensing 36 and solar energy conversion. 37 The sensor electrode size requirements make the CMEs a highly desirable option 23 that is being intensely pursued since 1940s.…”

Section: Applied Chemistry Defined Cmes As ''The Electrodes Made Of Amentioning

confidence: 99%

Chemically Modified Metal Oxide Nanostructures Electrodes for Sensing and Energy Conversion

Elhag¹

2017

Linköping Studies in Science and Technology. Dissertations

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“…The CMEs can act as an electrocatalyst or as electrochemical sensors, increasing their sensitivity and selectivity (Baldwin & Thomsen, 1991;de Sá, Paim, & Stradiotto, 2014;El-Desoky & Ghoneim, 2011;Mattos, do Carmo, Oliveira, & Stradiotto, 2008;Pournaghi-Azar & Sabzi, 2003;Salimi, Abdi, & Khayatiyan, 2004;Sartori, Zezza, Paim, & Stradiotto, 2014;Sedenho et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Electrocatalitic Detection of Hydrazine Using Chemically Modified Electrodes with Cobalt Pentacyanonitrosylferrate Adsorbed on the 3–Aminopropylsilica Surface

Sá¹,

Maraldi²,

Bonfim³

et al. 2017

IJC

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Cobalt pentacyanonitrosylferrate on the aminopropylsilica silica gel surface (SiCoNP) was previously prepared following two steps. The electrochemical behavior of SiCoNP modified electrode showed two redox couples, the first and second redox couples were observed at anodic potential (Epa) 1 = 0.36 and 0.60 V vs. Ag/AgCl attributed to the oxidation of Co (II) to Co (III) and Fe (II) (CN) 5 NO/Fe (III) (CN) 5 NO, respectively. The modified carbon paste electrode with SiCoNP was tested in the hydrazine electrooxidation. In the hydrazine electrooxidation, the H + release was observed and the two metal centers are involved in this process. The proposed mechanism has been described and based on studies of the effect of hydrogen ion concentration in the redox process of bivalent compound formed. Thus a large increase in hydrogen ion concentration promotes the formation of an intermediate electroactive species with an anodic peak at 0.56 V. The nature of this species is not well established but may be related to protonation of cyanide or NO groups present. The modified graphite paste electrode presented a limit of detection of 2.38×10 -4 mol L -1 and amperometric sensitivity of 1.37×10 -6 A.mol -1 .L.

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Chemically modified electrodes in liquid chromatography detection: A review

Cited by 116 publications

References 72 publications

Electrochemical sensors: a powerful tool in analytical chemistry

Electrochemical sensors: a powerful tool in analytical chemistry

Chemically Modified Metal Oxide Nanostructures Electrodes for Sensing and Energy Conversion

Electrocatalitic Detection of Hydrazine Using Chemically Modified Electrodes with Cobalt Pentacyanonitrosylferrate Adsorbed on the 3–Aminopropylsilica Surface

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