β-Cyclodextrin inclusion complex as the immobilization matrix for laccase in the fabrication of a biosensor for dopamine determination

Hua, Zulin; Qin, Qin; Bai, Xue; Wang, Chaofan; Huang, Xin

doi:10.1016/j.snb.2015.06.108

Cited by 41 publications

(17 citation statements)

References 62 publications

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“…Laccase (Lac), as a multicopper oxidase, can catalyze the DA to its oxidation form accompanied by reduction of molecular. Based on this, a large number of Lac-based biosensors for the detection of DA have been reported [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Pd/Bacterial Cellulose Hybrid Nanofibers for Dopamine Detection

Wang

et al. 2016

Molecules

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Palladium nanoparticle-bacterial cellulose (PdBC) hybrid nanofibers were synthesized by in-situ chemical reduction method. The obtained PdBC nanofibers were characterized by a series of analytical techniques. The results revealed that Pd nanoparticles were evenly dispersed on the surfaces of BC nanofibers. Then, the as-prepared PdBC nanofibers were mixed with laccase (Lac) and Nafion to obtain mixture suspension, which was further modified on electrode surface to construct novel biosensing platform. Finally, the prepared electrochemical biosensor was employed to detect dopamine. The analysis result was satisfactory, the sensor showed excellent electrocatalysis towards dopamine with high sensitivity (38.4 µA¨mM´1), low detection limit (1.26 µM), and wide linear range (5-167 µM). Moreover, the biosensor also showed good repeatability, reproducibility, selectivity and stability and was successfully used in the detection of dopamine in human urine, thus providing a promising method for dopamine analysis in clinical application.

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Section: Introductionmentioning

confidence: 99%

Preparation of Pd/Bacterial Cellulose Hybrid Nanofibers for Dopamine Detection

Wang

et al. 2016

Molecules

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“…Dopamine (DA) is a naturally occurring catecholamine that plays crucial role in the function of cardiovascular, central nervous, renal and hormonal systems and its anomalous concentration cause numerous problems like Parkinson's disease, neurological disorder, drug addiction and Schizophrenia [1][2][3][4][5][6][7]. Therefore, searching an appropriate method for sensitive determination of DA is of great importance in the biological diagnosis.…”

Section: Introductionmentioning

confidence: 99%

“…Different pervious works have been reported for determination of DA. To mention some of them: chromatography [8,9], spectrophotometry [10][11][12], fluorescence [13], chemiluminescence [14,15], and electroanalysis [1][2][3][4][5][6][16][17][18][19]. Electrochemical techniques have attracted great concern over other analytical methods as the analysis is fast, low in cost, high accuracy and low detection limit [1][2][3][4][5][6][7]20].…”

Section: Introductionmentioning

confidence: 99%

“…DA at the physiological pH exists in its cationic form [1,24]. Based on this property, to detect DA selectively in the presence of other electroactive ionic species different methods have been developed [25,26].…”

Section: Introductionmentioning

confidence: 99%

“…= 8.87) exists in its cationic form whereas AA (pK a = 4.10) exists in its anionic form at physiological pH 7.4 [1], it could be possible to differentiate the two species using electrochemically charged electrode. Since p-nitroaniline (PNA) film modified glassy carbon surface exists in anionic form, attractive electrostatic interactions can occur with the positively charged DA.…”

Section: Introductionmentioning

confidence: 99%

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Selective electrochemical determination of dopamine at p-nitroaniline film-hole modified glassy carbon electrodes

Olana¹,

Kitte²,

Geletu³

et al. 2018

Bull. Chem. Soc. Eth.

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ABSTRACT. Herein, we report determination of dopamine (DA) at modified glassy carbon electrode (GCE) with a film produced by reduction of diazonium generated from p-nitroaniline (PNA). Pores were created purposely by stripping pre-deposited gold nanoparticles (AuNPs) in the modifier film. The modified electrodes were characterized electrochemically by common redox probes: hydroquinone (HQ), hexacyanoferrate [(Fe(CN) . Comparison was made for the cyclic voltammetric and amperometric response of DA using the modified electrodes against the bare GCE in phosphate buffer solution (PBS) of pH 7.5. The bare and modified GCE showed a linear response to DA in the concentration range of 0.2-2.2 mM and 5-35 µM with detection limit of 0.015 mM and 0.6112 µM, respectively. The modified electrode showed high sensitivity, well selectivity, good anti-interference ability, durable stability and good electrode reproducibility for determining DA. The reported modified electrode is a promising sensor for use in electroanalysis of DA.

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