Preparation of nano-sized Pb2+ imprinted polymer and its application as the chemical interface of an electrochemical sensor for toxic lead determination in different real samples

Alizadeh, Taher; Amjadi, Somaye

doi:10.1016/j.jhazmat.2011.03.067

Cited by 82 publications

(30 citation statements)

References 84 publications

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“…explored in order to improve the sensitivity and stability of the sensor. Five imprinted electrodes were prepared with different scan cycles (7,10,15,20,25) and used to detect 5×10 -8 M ATZ. As shown in Fig 5(A), the relative current change reached maximum when the number of scan cycle was 15.…”

Section: Selectivity Toward Atzmentioning

confidence: 99%

Molecularly imprinted polymer-based sensors for atrazine detection by electropolymerization of o-phenylenediamine

Yan-fen

Zhao

et al. 2015

RSC Adv.

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A sensitive and selective atrazine (ATZ) electrochemical sensor was developed based on molecularly imprinted polymer (MIP). The density functional theory at B3LYP/6-31G (d, p) level and Gaussian 2009 package was used to calculate the interaction energy of template-monomers. The MIP sensing film was prepared by electropolymerization of o-phenylenediamine (o-PD) using ATZ as the template. Some factors affecting the activity of the sensor have been discussed. The performance of the sensor was characterized by cyclic voltammetry and differential pulse voltammetry.Under the optimal experimental conditions, the relative current change was linear to the concentration of ATZ in the range of 5.0×10 -9 to 1.4×10 -7 M with a detection limit of 1.0×10 -9 M. The result of selectivity experiment showed that imprint electrode has good response and selectivity towards ATZ. The proposed MIP-based sensor also showed a good stability and repeatability.

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Section: Selectivity Toward Atzmentioning

confidence: 99%

Molecularly imprinted polymer-based sensors for atrazine detection by electropolymerization of o-phenylenediamine

Yan-fen

Zhao

et al. 2015

RSC Adv.

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“…Alizadeh e Amjadi recentemente publicaram trabalhos envolvendo a aplicação de IIPs em sensores eletroquímicos empregando-se voltametria e potenciometria para determinação de Pb 2+ e Cd 2+ em diferentes amostras de água. 78,79 Para determinação de Hg 2+ via sensor voltamétrico, um novo procedimento foi proposto sem o uso do agente reticulante, neste caso, a vinilpiridina foi utilizada como monômero e agente reticulante. 80 Desta maneira, os íons Hg 2+ interagem somente com a vinilpiridina, ambos dissolvidos em dimetilsulfóxido na presença do iniciador radicalar, o que facilita o estudo da reação e possibilita uma melhor otimização.…”

Section: Uso De Polímeros Impressos Em Sensores Químicos E Eletroquímunclassified

Polímeros impressos com íons: fundamentos, estratégias de preparo e aplicações em química analítica

Marestoni¹,

Sotomayor²,

Segatelli³

et al. 2013

Quím. Nova

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Recebido em 29/1/13; aceito em 18/5/13; publicado na web em 1/7/13 ION IMPRINTED POLYMERS: FUNDAMENTALS, PREPARATION STRATEGIES AND APPLICATIONS IN ANALYTICAL CHEMISTRY. Chemical imprinting technology has been widely used as a valuable tool in selective recognition of a given target analyte (molecule or metal ion), yielding a notable advance in the development of new analytical protocols. Since their discovery, molecularly imprinted polymers (MIPs) have been extensively studied with excellent reviews published. However, studies involving ion imprinted polymers (IIPs), in which metal ions are recognized in the presence of closely related inorganic ions, remain scarce. Thus, this review involved a survey of different synthetic approaches for preparing ion imprinted adsorbents and their application for the development of solid phase extraction methods, metal ion sensors (electrodes and optodes) and selective membranes.Keywords: imprinting technology; preconcentration; sensors. INTRODUÇÃOO desenvolvimento de novos materiais tem se expandido para diversos campos do conhecimento e trazido grandes inovações em diversas áreas. Neste sentido, o estudo de novos materiais pode contribuir significativamente na área de química analítica, introduzindo maior seletividade e sensibilidade aos métodos analíticos conhecidos, por exemplo, através da variação da composição química, das dimensões físicas e da inclusão de componentes biológicos fazendo com que estes apresentem propriedades novas, o que potencializa uma ampla aplicabilidade. Tais materiais incluem os materiais híbridos, nanomateriais e materiais biomoleculares.1 Diante de uma nova realidade, na qual se tem buscado o estabelecimento de padrões de concentrações cada vez menores de poluentes em amostras de interesse ambiental, farmacêutica, clínica e alimentí-cia, métodos alternativos vêm sendo investigados, dentre os quais o uso de materiais adsorventes, que promovam a retenção seletiva e reversível do analito. A determinação de espécies químicas em concentrações baixas (em geral ≤ µg L -1 ) constitui, até os dias atuais, um dos grandes desafios para os químicos analíticos, apesar dos mesmos terem em mãos técnicas significativamente precisas, seletivas e sensíveis.2 Em face à concentração baixa do elemento de interesse e, ainda aos efeitos da matriz, em muitos casos torna-se uma tarefa difícil a determinação direta de concentrações baixas de analitos em amostras. Sendo assim, etapas de pré-concentração se fazem necessárias a fim de viabilizar a análise. Em determinadas situações, as etapas de pré-concentração além de conferir aumento de sensibilidade do método, deve também garantir seletividade ao sistema em estudo. Isto ocorre porque, em geral, os níveis dos analitos são muito baixos, da ordem de µg L -1 , na presença de concentrações altas de concomitantes, da ordem de g L -1 . Sendo assim, os tratamentos prévios da amostra, conferidos por etapas de extração e/ou pré-concentração, visam eliminar o interferente e/ou pré-concentrar o analito.As principais estratégias ana...

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“…[1][2][3] Leadcontained products are now widely used in our daily commodities, such as batteries, cosmetics, gasoline and electroplating products, etc. Additionally, lead exists in some ores, rocks and soils, which contaminates river, air and human food, especially dust around lead-containing mining plants.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Pb(II) Ion Imprinted Polymer and Its Application as the Interface of an Electrochemical Sensor for Trace Lead Determination

Xiong

Huang

et al. 2016

ANAL. SCI.

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An ion imprinted polymer (IIP) was synthesized by using Pb(II) as a template, methacrylic acid as a monomer, 8-hydoxyquinoline as a ligand, ethylene glycol dimethacrylate (EGDMA) as a crosslinker, and azobisisobutyronitrile as initiator. It can be applied to prepare lead ion selective voltammetric sensor for Pb(II) adsorption and trace detection. The Pb(II)-IIP was characterized by FTIR spectra and SEM image. Under optimized conditions of polymerization, the Pb(II)-IIP showed good adsorption behavior toward Pb(II), with a magnitude of three times higher than that of the non imprinted polymer (NIP). Also, it exhibited a favorable selectivity for Pb(II), compared with other heavy metal ions of Hg(II), Cd(II), Cu(II), and a negligible adsorption to the other cations. The synthesized IIP was used to determine trace levels of Pb(II) in food and water samples, with a calibration linear range over Pb(II) concentrations of 0.05 -60 μM and a limit of detection at 0.01 μM.

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Preparation of nano-sized Pb2+ imprinted polymer and its application as the chemical interface of an electrochemical sensor for toxic lead determination in different real samples

Cited by 82 publications

References 84 publications

Molecularly imprinted polymer-based sensors for atrazine detection by electropolymerization of o-phenylenediamine

Molecularly imprinted polymer-based sensors for atrazine detection by electropolymerization of o-phenylenediamine

Polímeros impressos com íons: fundamentos, estratégias de preparo e aplicações em química analítica

Preparation of Pb(II) Ion Imprinted Polymer and Its Application as the Interface of an Electrochemical Sensor for Trace Lead Determination

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