Highly Sensitive and Selective Detection of Dopamine at Poly(chromotrope 2B)-Modified Glassy Carbon Electrode in the Presence of Uric Acid and Ascorbic Acid

Li, Xiaobo; Rahman, Md. Mahbubur; Xu, Guangri; Lee, Jae‐Joon

doi:10.1016/j.electacta.2015.05.062

Cited by 60 publications

(41 citation statements)

References 53 publications

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“…e result indicated that the redox process of PCH was surface-controlled. e PCH film could be undergoing a redox process between naphthoquinone and naphthol [15,[32][33][34].…”

Section: Formation and Characterization Of The Pch Film As Shown Inmentioning

confidence: 99%

“…However, the aforementioned methods possess disadvantages such as the requirement of sophisticated laboratories, well-trained instrument operators, an expensive instrument, complicated analysis procedures, and time-consuming preparations [4]. Meanwhile, various electrochemical methods have attracted increasing attention due to their high sensitivity, simple operation, fast response, and low cost [4,[15][16][17]. Many modifiers such as mesoporous Pt [18], RGO-MWCNT [19], graphene/AuNPs/chitosan [20], Pt-MnO 2 [21], carbon nanofragment [22], and conducting polymers (CPs) [23] have been introduced to enhance the electrode performance.…”

Section: Introductionmentioning

confidence: 99%

“…However, there was no polymer formed at the bare GCE, as shown in the inset. Herein, the CH molecules react with each other via -OH-bridge to form polymer [15] as shown in Figure S1.…”

Section: Introductionmentioning

confidence: 99%

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Sensitive and Simultaneous Determination of Hydroquinone and Catechol in Water Using an Anodized Glassy Carbon Electrode with Polymerized 2-(Phenylazo) Chromotropic Acid

Zhang

Jin

et al. 2019

Journal of Chemistry

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Hydroquinone (HQ) and catechol (CT) are considered as environmental pollutants with high toxicity. We have developed a simple electrochemical sensor using an anodized glassy carbon electrode modified with a stable 2-(phenylazo) chromotropic acid- (CH-) conducting polymer (PCH/AGCE). The PCH/AGCE sensor showed good electrocatalytic activity and reversibility towards the redox of HQ and CT in phosphate buffer solution (PBS, pH 7.0). The cyclic voltammetry (CV) in mixed solution of HQ and CT showed that the oxidation peaks of them became well resolved with a peak separation of 0.1 V. The detection limits of HQ and CT were 0.044 and 0.066 μM, respectively, in a wide linear response range of 1–300 μM for both. Moreover, the sensor displayed an excellent selectivity in the presence of common interferences. This study provided a simple, sensitive, and high recovery method for simultaneous and quantitative determination of HQ and CT in aqueous medium.

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“…e result indicated that the redox process of PCH was surface-controlled. e PCH film could be undergoing a redox process between naphthoquinone and naphthol [15,[32][33][34].…”

Section: Formation and Characterization Of The Pch Film As Shown Inmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sensitive and Simultaneous Determination of Hydroquinone and Catechol in Water Using an Anodized Glassy Carbon Electrode with Polymerized 2-(Phenylazo) Chromotropic Acid

Zhang

Jin

et al. 2019

Journal of Chemistry

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“…To further improve the selectivity of CNT sensor for DA, it is feasible to design a negatively charged surface to adsorb the target but repulse interferents (such as AA and UA), since DA (pK a =8.87) exists as protonated cation while AA (pK a =4.10) and UA (pK a =5.75) exist as carboxylic anions at physiological pH 7.4 . To this end, several composite polymers have been investigated to incorporate negative‐charged groups into the modified sensor, such as Nafion , poly(chromotrope 2B) , poly(calmagite) , poly( p ‐toluene sulfonic acid) . Among them, polypyrrole (PPy), one of conducting polymers, is extensively studied owing to its good conductivity, stability, biocompatibility and ease of fabrication both chemically and electrochemically .…”

Section: Introductionmentioning

confidence: 99%

One‐pot Electro‐polymerized SDPAS/PPy/CNTs Modified Electrode for Selective Detection of Dopamine

et al. 2018

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To improve the performance of dopamine (DA) detection in the presence of ascorbic acid (AA) and uric acid (UA), sodium diphenylamine sulfonate/polypyrrole/multi‐walled carbon nanotubes (SDPAS/PPy/CNTs) film was fabricated on the surface of gold electrode through one‐pot polymerization initiated by electrochemical oxidation. SDPAS were covalently embedded into the backbone of PPy to endow the resultant film with numerous negative‐charged terminals, resulting in selective pre‐adsorption of protonated DA+ on the electrode and switching the following anodic reaction to be an adsorption‐controlled process. The detection of DA in the presence of AA and UA by square wave voltammetry method showed an outstanding repeatability with the relative standard deviation of 0.45 %. A good linear relationship was observed between the oxidative peak current and the concentration of DA in the range of 0.827–104 μM (R2=0.993), and the limit of detection (LOD) was calculated to be 0.105 μM (S/N=3).

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“…CPs have various reactive functional groups ( e . g ., –COOH and –NH 2 ) that facilitate the immobilization of pDNA . Among CPs, poly(thionine) (PTH) contains free –NH 2 functional groups, which corroborate the covalent immobilization of pDNA via phosphoramidate bonding .…”

Section: Introductionmentioning

confidence: 99%

Sensitivity Control of Label‐free DNA Hybridization Detection Based on Poly(thionine)‐Modified Glassy Carbon and Gold Electrodes

Rahman

Kim

Lee

2016

Bulletin Korean Chem Soc

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Poly(thionine) (PTH)‐modified glassy carbon (PTH‐S/GCE and PTH‐D/GCE) and gold (PTH‐S/Au) electrodes were prepared for the label‐free detection of DNA hybridizations and their performances in terms of sensitivity and selectivity were compared. Single‐strand probe DNA (pDNA) was immobilized on the PTH films via covalent bonding between the amine (−NH2) group of PTH and the phosphate (PO43−) group at the 5' end of the pDNA. The PTH oxidation current was decreased because of the increase in the stiffness of PTH films. The current was further decreased after the duplex was formed by the hybridization of the target complementary DNA (cDNA). The pDNA/PTH‐S/GCE, pDNA/PTH‐D/GCE, and pDNA/PTH‐S/Au sensors showed excellent sensitivities of ca. 2.1, 55, and 1.9 μA/cm2/nM, respectively, and the detection limits (S/N = 3) were ca. 40.6, 1.5, and 45 pM, respectively, for the hybridization of target cDNA.

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Highly Sensitive and Selective Detection of Dopamine at Poly(chromotrope 2B)-Modified Glassy Carbon Electrode in the Presence of Uric Acid and Ascorbic Acid

Cited by 60 publications

References 53 publications

Sensitive and Simultaneous Determination of Hydroquinone and Catechol in Water Using an Anodized Glassy Carbon Electrode with Polymerized 2-(Phenylazo) Chromotropic Acid

Sensitive and Simultaneous Determination of Hydroquinone and Catechol in Water Using an Anodized Glassy Carbon Electrode with Polymerized 2-(Phenylazo) Chromotropic Acid

One‐pot Electro‐polymerized SDPAS/PPy/CNTs Modified Electrode for Selective Detection of Dopamine

Sensitivity Control of Label‐free DNA Hybridization Detection Based on Poly(thionine)‐Modified Glassy Carbon and Gold Electrodes

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