Capacitively coupled contactless conductivity detection on microfluidic systems—ten years of development

Coltro, Wendell K. T.; Lima, Renato S.; Segato, Thiago Pinotti; Carrilho, Emanuel; Jesus, Dosil Pereira de; Lago, Claudimir Lúcio do; Silva, José Alberto Fracassi da

doi:10.1039/c1ay05364g

Cited by 147 publications

(101 citation statements)

References 81 publications

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“…14,15 Applications in electrophoretic systems, meanwhile, exhibit drawbacks related to interferences between the electric fields of detection and separation. 4 CNT is a nanomaterial broadly used for the development of detectors and sensors. [16][17][18] Such compounds aggregate advantages which can improve the selectivity and sensitivity of the analytical method.…”

mentioning

confidence: 99%

Glass/PDMS hybrid microfluidic device integrating vertically aligned SWCNTs to ultrasensitive electrochemical determinations

et al. 2012

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This communication reports a promising platform for rapid, simple, direct, and ultrasensitive determination of serotonin. The method is related to integration of vertically aligned singlewalled carbon nanotubes (SWCNTs) in electrochemical microfluidic devices. The required microfabrication protocol is simple and fast. In addition, the nanomaterial influenced remarkably the obtained limit-of-detection (LOD) values. Our system achieved a LOD of 0.2 nmol L 21 for serotonin, to the best of our knowledge one of the lowest values reported in the literature.Glass/elastomer hybrid microfluidic platforms with integrated electrochemical detectors are powerful analytical tools. Their main advantages include: (i) low cost; (ii) chemical inertia; (iii) optical transparency; (iv) thermal, mechanical, and chemical stability; (v) automation capacity, and; (vi) easy microfabrication. In addition, they offer high values of reproducibility and sensitivity.

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confidence: 99%

Glass/PDMS hybrid microfluidic device integrating vertically aligned SWCNTs to ultrasensitive electrochemical determinations

et al. 2012

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“…Neste contexto, nos últimos anos tem-se observado o desenvolvimento de eletrodos bioinspirados, 33 monocamadas autorganizadas, 34 microfluídica, 35 e point-of-care test (POCT). 36 O emprego de nanopartículas magnéticas para pré-concentrar o analito de amostras complexas e o emprego da eletroanalítica em papel são alguns exemplos.…”

Section: Eletroanalíticaunclassified

“…Esta contribuição tem permitido a detecção de espécies com pequenos limites de detecção, bem como aberto uma nova possibilidade de detecção eletroquímica condutométrica sem o contato físico da solução com os eletrodos. 35 Deste modo, embora seja difícil citar todas as relevantes contribuições dos grupos de Eletroanalítica do Brasil, é possível concluir que a comunidade científica tem feito grandes progressos em eletroanálise tanto em micro como em nanoescala, no desenvolvimento de novos sensores e dispositivos competitivos com a determinação de analitos de interesse biológico e ambiental em níveis compatíveis com técnicas pouco econômicas e que demandam grande tempo de análise.…”

Section: Eletroanalíticaunclassified

Panorama Da Eletroquímica E Eletroanalítica No Brasil

Zanoni¹,

Borges²,

Benedetti³

et al. 2017

Quim. Nova

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OVERVIEW OF THE ELECTROCHEMISTRY AND ELECTROANALYTICAL CHEMISTRY IN BRAZIL. Electrochemistry and Electroanalytical chemistry play an important role to face the challenges of the contemporary world. They have contributed to the advance of the scientific development of our country, helped to promote economic and social progress as well as cultural dissemination. These areas have greatly contributed to the knowledge about thermodynamics and kinetics of the electron transfer reactions, energy conversion, synthesis and modification of compounds, corrosion, and development of fast, sensitive, and selective analytical methods. This work presents an overview of the areas by analyzing the technical and scientific papers produced in Brazil on these subjects, and the analysis of the Brazilian scientific societies that were formed and consolidated, which have contributed to spread the scientific knowledge. The improvement of these areas can be attributed to the good quality of the human resources formed during long time as well as the growing of distribution of research groups in different regions of the country. The success/ future of these areas are associated with good academic/scientific education, low cost of instrumentation, formation of networks of excellence between researchers, and large cooperation projects that improved with the sharing of ideas, technologies, infrastructure, and equipment. All of which has contributed to strengthening consolidated and emerging graduation programs.Keywords: Trends in Electrochemistry; Electroanalytical chemistry assessment; research in Electrochemistry and Electroanalysis. INTRODUÇÃOA Eletroquímica se caracteriza pela natureza universal e multidisciplinar e desempenha papel importante no desenvolvimento da ciência, com reflexos no crescimento econômico e melhoramento da qualidade de vida. Pode ser definida de modo mais abrangente como o ramo da Química que lida com reações químicas que envolvem corrente elétrica e potencial. Algumas reações químicas que ocorrem espontaneamente podem gerar corrente elétrica, que pode ser usada para fazer trabalho útil; enquanto outras reações químicas podem ser forçadas a prosseguir usando corrente elétrica.A história da Eletroquímica começa no século XVIII quando Luigi Galvani (1737-1798) estabeleceu uma ponte entre contração muscular e eletricidade, e Alessandro Volta (1745-1827) anunciou a invenção da pilha (ou célula) voltaica, a primeira bateria elétrica moderna.Enquanto seus antecessores, incluindo Benjamin Franklin (1706-1790), contribuíram para o entendimento da eletricidade estática, a pilha voltaica produzia corrente contínua e assim abriu duas novas áreas de estudo: a produção química de eletricidade e os efeitos da eletricidade sobre os compostos químicos. As descobertas de Michael Faraday (1791-1867) que resultaram nas duas leis fundamentais da Eletroquímica, publicadas em 1834, predizem quanto produto resulta ao passar uma certa quantidade de carga através de um composto químico ou de sua solução, processo que ele chamou de "eletróli...

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“…It is universal for all ionic compounds without derivatization or indirect approaches. C 4 D features unprecedented ease of the cell arrangement and inherent prevention of the electrode fouling (Coltro et al, 2012;Fracassi da Silva & do Lago, 1998;Kubáň & Hauser, 2013;Zemann, 2003;Zemann, Schnell, Volgger, & Bonn, 1998). An earlier article (Tanyanyiwa, Abad-Villar, & Hauser, 2004) has demonstrated the possibility of using CE-C 4 D on a microchip platform for separation and detection of acesulfame-K and cyclamate in model solutions.…”

Section: Introductionmentioning

confidence: 98%

Sensitive simultaneous determination of three sulfanilamide artificial sweeters by capillary electrophoresis with on-line preconcentration and contactless conductivity detection

Yang

Zhou

et al. 2015

Food Chemistry

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Capacitively coupled contactless conductivity detection on microfluidic systems—ten years of development

Cited by 147 publications

References 81 publications

Glass/PDMS hybrid microfluidic device integrating vertically aligned SWCNTs to ultrasensitive electrochemical determinations

Glass/PDMS hybrid microfluidic device integrating vertically aligned SWCNTs to ultrasensitive electrochemical determinations

Panorama Da Eletroquímica E Eletroanalítica No Brasil

Sensitive simultaneous determination of three sulfanilamide artificial sweeters by capillary electrophoresis with on-line preconcentration and contactless conductivity detection

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