Electrochemical behaviors and simultaneous determination of guanine and adenine based on graphene–ionic liquid–chitosan composite film modified glassy carbon electrode

Niu, Xiuli; Yang, Wu; Ren, Jie; Guo, Hao; Long, Shi-Jia; Chen, Jiaojiao; Gao, Jinzhang

doi:10.1016/j.electacta.2012.07.041

Cited by 109 publications

(39 citation statements)

References 37 publications

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“…The absorption at 1393 cm À1 is from the in-plane O-H deformation vibration of -COOH. These results are consistent with the literature (Niu et al 2012). Compared to graphene oxide, the spectrum of nanocomposite, besides the characteristic peaks at 1723, 1635, and 1390 cm À1 , also displays the characteristic absorptions of ferrocene monocarboxylic acid.…”

supporting

confidence: 95%

A Novel Electrochemical Immunosensor for Prostate-Specific Antigen Based on Noncovalent Nanocomposite of Ferrocene Monocarboxylic Acid with Graphene Oxide

et al. 2014

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A novel electrochemical immunosensor was developed for the determination of prostate-specific antigen based on immobilization of appropriate antibodies on gold nanoparticles and a poly-(2,6-pyridinediamine) modified electrode. The nanocomposite of ferrocene monocarboxylic acid hybridized graphene oxide was prepared by a p-p stacking interaction and was used as the electrochemical probe. A sandwich-type complex immunoassay was applied with polyclonal prostate-specific antigen antibodies labeled with the nanocomposite of ferrocene monocarboxylic acid hybridized graphene oxide. In order to improve the sensitivity, a potentiostatic method was used to reduce graphene oxide. Cyclic voltammetry and differential pulse voltammetry were employed to characterize the assembly process and the performance of the immunosensor. Under optimal conditions, the peak current of the immunosensor increased with concentration, showing a linear relationship between the peak current and the logarithm of the prostate-specific antigen concentrations in a wide range of 2.0 pg mL À1 to 10.0 ng mL À1 with a low detection limit of 0.5 pg mL À1 . The immunosensor was used for the determination of prostate-specific antigen in serum.

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supporting

confidence: 95%

A Novel Electrochemical Immunosensor for Prostate-Specific Antigen Based on Noncovalent Nanocomposite of Ferrocene Monocarboxylic Acid with Graphene Oxide

et al. 2014

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“…relationship can be described by the following equation: I (lA) = 3.45 + 0.2c (lM) (R 2 = 0.9914). The detection limit is estimated to be 0.48 lM (S/N = 3), which is much lower than many reported works [20][21][22].…”

Section: Electrochemical Reactivitymentioning

confidence: 76%

“…Based on all of the data of our prepared MCF/GCE for the detection of purine and pyrimidine DNA bases, Table S1 (Supplementary Materials, [20,[24][25][26]) compares the analytical performance of MCF/GCE with other modified electrodes reported previous, which indicates that MCF is an excellent electrocatalyst for purine and pyrimidine bases.…”

Section: Determination Of Thymine and Cytosinementioning

confidence: 99%

Direct electrocatalytic and simultaneous determination of purine and pyrimidine DNA bases using novel mesoporous carbon fibers as electrocatalyst

Ren

Wang

Zhang

et al. 2015

Journal of Electroanalytical Chemistry

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“…The relative standard deviation (RSD) was obtained as 1.1 % for 11 parallel determinations of 0.45 g mL −1 of adenine. The method showed a wider linear range and higher sensitivity than those detailed in the literature (García del Moral et al, 2005;Wang et al, 2006Wang et al, , 2008Yin et al, 2010;Niu et al, 2012). In addition, the lower RSD values provided a guarantee for the accurate determination of adenine.…”

Section: Resultsmentioning

confidence: 83%

Spectroscopy studies of sandwich-type complex of silver(I) co-ordinated to nuclear fast red and adenine and its analytical applications

Cui

Gong

et al. 2015

Chemical Papers

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A novel fluorometric method for the determination of adenine was proposed, based on the fluorescence quenching of a nuclear fast red-silver complex as a small molecule optical probe in the presence of adenine. The characteristic spectra of absorption, resonance Rayleigh scattering (RRS) and the fluorescence of the system were analysed. Adenine, Ag + and nuclear fast red formed a sandwichtype complex. The composition of the compound and the mechanisms of fluorescence quenching were discussed. The optimal conditions for the reaction and the effects of co-existing substances were also investigated. The quenched fluorescence intensity was proportional to the concentration of adenine in the range of 0.03-0.90 µg mL −1 , with the limit of detection of 0.023 µg mL −1 . The method was applied satisfactorily to the determination of adenine in synthetic samples, herring sperm DNA, human sera and vitamin B4 tablets with recoveries from 95.3 % to 105 %.

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Electrochemical behaviors and simultaneous determination of guanine and adenine based on graphene–ionic liquid–chitosan composite film modified glassy carbon electrode

Cited by 109 publications

References 37 publications

A Novel Electrochemical Immunosensor for Prostate-Specific Antigen Based on Noncovalent Nanocomposite of Ferrocene Monocarboxylic Acid with Graphene Oxide

A Novel Electrochemical Immunosensor for Prostate-Specific Antigen Based on Noncovalent Nanocomposite of Ferrocene Monocarboxylic Acid with Graphene Oxide

Direct electrocatalytic and simultaneous determination of purine and pyrimidine DNA bases using novel mesoporous carbon fibers as electrocatalyst

Spectroscopy studies of sandwich-type complex of silver(I) co-ordinated to nuclear fast red and adenine and its analytical applications

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