Highly sensitive non-enzymatic electrochemical glucose sensor surpassing water oxidation interference

Journal of Materials Chemistry B ◽

10.1039/d1tb01332g ◽

2021 ◽

Author(s):

Neha Thakur ◽

Debaprasad Mandal ◽

Tharamani Chikka Nagaiah

Keyword(s):

Water Oxidation ◽

Glucose Sensor ◽

High Sensitivity ◽

The Novel ◽

Enzymatic Sensor ◽

Highly Sensitive ◽

Sensitive Determination

An electrochemical non-enzymatic sensor based on NiVP/Pi material was developed for the selective and sensitive determination of glucose. The novel sensor shows ultra-high sensitivity of 6.04 mA μM-1 cm-2 with...

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Highly Sensitive Determination of Dopamine Using Osmium/Nafion Modified Disposable Integrated Biosensor

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.60-61.311 ◽

2009 ◽

Vol 60-61 ◽

pp. 311-314 ◽

Cited By ~ 1

Author(s):

Chun Xiu Liu ◽

Hong Min Liu ◽

Qing De Yang ◽

Nan Sen Lin ◽

Yi Lin Song ◽

...

Keyword(s):

Detection Limit ◽

Correlation Coefficient ◽

Gold Electrode ◽

High Sensitivity ◽

Differential Pulse ◽

Redox Polymer ◽

Highly Sensitive ◽

Sensitive Determination ◽

Excellent Reproducibility

A biosensor based on gold electrode modified by Pt nanaoparticles/Osmium redox polymer/Nafion trilayer film was fabricated and used for selective and sensitive determination of dopamine. The biosensor is explored for DA sensing using the cyclic voltammetry (CV), amperometric and differential pulse voltammetric (DPV) methods. The CV anodic peak currents showed a linear range with a correlation coefficient of 0.996, localized in the concentration range 0~192 μM. The differential pulse voltammetric (DPV) peak currents were linear with DA concentration during 2~425 μM with correlation coefficient of 0.99. The biosensor showed high sensitivity of 0.5 nA /nM cm2 and excellent reproducibility with the detection limit of ~10 nM (S/N=3) for the determination of DA. The easy fabrication, low detection limit and high sensitivity of the integrated biosensor making it particularly suitable for the analytical purposes.

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A QCM Immunosensor for Rapid Determination of Ractopamine in Food Based on Enzyme-AuNPs for Signal Amplification and Magnetic β-Cyclodextrins for Extraction

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.738-739.56 ◽

2015 ◽

Vol 738-739 ◽

pp. 56-60

Author(s):

Shu Xian Chen ◽

Jing Liu ◽

Dao Dong Pan ◽

Ning Gan

Keyword(s):

Signal Amplification ◽

Rapid Determination ◽

Screening Method ◽

High Sensitivity ◽

The Novel ◽

Highly Sensitive ◽

Reliable Quantification ◽

Highly Sensitive Detection ◽

Amplification Strategy

An enzyme amplified immunosensor for highly sensitive detection of Ractopamine (RAC) in foodstuff was developed based on quartz crystal microbalance (QCM). The high sensitivity was achieved by enzyme-AuNPs signal amplification strategy and magnetic β-cyclodextrins (β-CD) enrichment capacity. The novel QCM immunosensor which combines with the advantages of high selectivity of immunoassays and the high sensitivity of QCM has been developed for the determination of trace residues of RAC in food production. Under optimum conditions, the differences in the frequencies (∆f) of the QCM were proportional to the concentration of RAC over the range from 0.01 to 10 ng mL-1. The minimal detection limit was 0.01 ng mL-1. Due to its high sensitivity, acceptable stability and good selectivity, the immunosensor realized reliable quantification of RAC in real foodstuff. The proposed project has the potential to become a successful on-site screening method in food safety.

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Cross Double Point Discharge as Enhanced Excitation Source for Highly Sensitive Determination of Arsenic, Mercury and Lead by Optical Emission Spectrometry

Journal of Analytical Atomic Spectrometry ◽

10.1039/d1ja00039j ◽

2021 ◽

Author(s):

Lin He ◽

Peixia Li ◽

Kai Li ◽

Tao Lin ◽

Jin Luo ◽

...

Keyword(s):

Double Point ◽

Hydride Generation ◽

Optical Emission ◽

Sample Introduction ◽

Excitation Source ◽

Emission Spectrometry ◽

Highly Sensitive ◽

Point Discharge ◽

Sensitive Determination

A new cross double point discharge (CrossPD) microplasma was designed as an excitation source to construct a miniaturized optical emission spectrometer with hydride generation (HG) for sample introduction. The CrossPD...

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