Horseradish Peroxidase Labelled-Sandwich Electrochemical Sensor Based on Ionic Liquid-Gold Nanoparticles for Lactobacillus brevis

Lactobacillus brevis is the most common bacteria that causes beer spoilage. In this work, a novel electrochemical immunosensor was fabricated for ultra-sensitive determination of L. brevis. Gold nanoparticles (AuNPs) were firstly electro-deposited on the electrode surface for enhancing the electro-conductivity and specific surface area. Ionic liquid was used for improving the immobilization performance of the immunosensor. After optimization, a linear regression equation can be observed between the ∆current and concentration of L. brevis from 104 CFU/mL to 109 CFU/mL. The limit of detection can be estimated to be 103 CFU/mL.

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Sandwich-type electrochemical immunosensor for sensitive determination of IgG based on the enhanced effects of poly-L-lysine functionalized reduced graphene oxide nanosheets and gold nanoparticles

Journal of Solid State Electrochemistry ◽

10.1007/s10008-017-3641-0 ◽

2017 ◽

Vol 21 (11) ◽

pp. 3281-3287 ◽

Cited By ~ 1

Author(s):

Ying Qu ◽

Lei Chen ◽

Hongping Deng ◽

Chunya Li

Keyword(s):

Gold Nanoparticles ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Electrochemical Immunosensor ◽

Graphene Oxide Nanosheets ◽

Reduced Graphene ◽

Sandwich Type ◽

Sensitive Determination

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Electrochemical sensor based on incorporation of gold nanoparticles, ionic liquid crystal, and β-cyclodextrin into carbon paste composite for ultra-sensitive determination of norepinephrine in real samples

Canadian Journal of Chemistry ◽

10.1139/cjc-2019-0025 ◽

2019 ◽

Vol 97 (12) ◽

pp. 805-814

Author(s):

Nada F. Atta ◽

Ahmed Galal ◽

Dalia M. El-Said

Keyword(s):

Gold Nanoparticles ◽

Ionic Liquid ◽

Liquid Crystal ◽

Electrochemical Sensor ◽

Current Response ◽

Carbon Paste ◽

Great Ability ◽

Real Samples ◽

Sensitive Determination

A novel, reliable electrochemical sensor is fabricated for direct and sensitive determination of norepinephrine (NE) based on gold nanoparticles, ionic liquid crystal, and β-cyclodextrin modified carbon paste electrode, namely AuILCCDCPE. The ionic liquid crystal (ILC) played a key role in improving the current response of electro-oxidation of NE compared with other ionic liquids modified electrodes. The ILC increased the ionic conductivity of the paste and formed noncovalent interactions with both host (CD) and guest (NE) compounds. The solid state structure of the ILC helped in the formation of ordered films in the paste. Furthermore, CD and Au nanoparticles raised the stability and the electrocatalytic ability of the proposed sensor. Under optimized conditions, the fabricated electrochemical sensor showed a good electrochemical response towards NE in human urine in the linear dynamic ranges of 0.05–10 μmol/L and 20–300 μmol/L with a correlation coefficient of 0.999 and detection limit of 3.12 × 10−9 mol/L in the low concentration range. The practical analytical performance of the sensor was attained for determination of NE in real samples with satisfied recovery results. This sensor has great ability to be extended for electrochemical applications in assays of other drugs.

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Sandwich-type electrochemical immunosensor for highly sensitive determination of cardiac troponin I using carboxyl-terminated ionic liquid and helical carbon nanotube composite as platform and ferrocenecarboxylic acid as signal label

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2018.09.010 ◽

2018 ◽

Vol 277 ◽

pp. 234-240 ◽

Cited By ~ 14

Author(s):

Huixiang Yan ◽

Xiaodi Tang ◽

Xudong Zhu ◽

Yanbo Zeng ◽

Xing Lu ◽

...

Keyword(s):

Ionic Liquid ◽

Cardiac Troponin ◽

Troponin I ◽

Electrochemical Immunosensor ◽

Highly Sensitive ◽

Sandwich Type ◽

Ferrocenecarboxylic Acid ◽

Sensitive Determination ◽

Carbon Nanotube Composite

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Indirect Determination of Amikacin by Gold Nanoparticles as Redox Probe

Current Drug Delivery ◽

10.2174/1567201817666200719005919 ◽

2020 ◽

Vol 17 ◽

Author(s):

Mansureh Alizadeh ◽

Mandana Amiri ◽

Abolfazl Bezaatpour

Keyword(s):

Gold Nanoparticles ◽

Bacterial Infections ◽

Limit Of Detection ◽

Pharmaceutical Preparation ◽

Cathodic Peak ◽

Easy Method ◽

Peak Current ◽

Indirect Determination ◽

Tract Infections

: Amikacin is an aminoglycoside antibiotic used for many gram-negative bacterial infections like infections in the urinary tract, infections in brain, lungs and abdomen. Electrochemical determination of amikacin is a challenge in electroanalysis because it shows no voltammetric peak at the surface of bare electrodes. In this approach, a very simple and easy method for indirect voltammetric determination of amikacin presented in real samples. Gold nanoparticles were electrodeposited at the surface of glassy carbon electrode in constant potential. The effect of several parameters such as time and potential of deposition, pH and scan rates on signal were studied. The cathodic peak current of Au3+ decreased with increasing amikacin concentration. Quantitative analysis of amikacin was performed using differential pulse voltammetry by following cathodic peak current of gold ions. Two dynamic linear ranges of 1.0 × 10−8–1.0 × 10-7 M and 5.0 × 10−7–1.0 × 10-3 M were obtained and limit of detection was estimated 3.0× 10−9 M. The method was successfully determined amikacin in pharmaceutical preparation and human serum. The effect of several interference in determination of amikacin was also studied.

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Rapid and sensitive determination of Pseudomonas aeruginosa by using a glassy carbon electrode modified with gold nanoparticles and aptamer-imprinted polydopamine

Microchemical Journal ◽

10.1016/j.microc.2021.106388 ◽

2021 ◽

pp. 106388

Author(s):

Masoumeh Sarabaegi ◽

Mahmoud Roushani

Keyword(s):

Pseudomonas Aeruginosa ◽

Gold Nanoparticles ◽

Glassy Carbon Electrode ◽

Glassy Carbon ◽

Carbon Electrode ◽

Sensitive Determination

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A novel self-assembled gold nanoparticles-molecularly imprinted modified carbon ionic liquid electrode with high sensitivity and selectivity for the rapid determination of bisphenol A leached from plastic containers

Journal of Environmental Chemical Engineering ◽

10.1016/j.jece.2021.105513 ◽

2021 ◽

pp. 105513

Author(s):

Rahil Jalilian ◽

Elham Ezzatzadeh ◽

Alireza Taheri

Keyword(s):

Gold Nanoparticles ◽

Ionic Liquid ◽

Bisphenol A ◽

Rapid Determination ◽

High Sensitivity ◽

Carbon Ionic Liquid Electrode ◽

Molecularly Imprinted ◽

Sensitivity And Selectivity ◽

Plastic Containers

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Determination of cobalt in water samples by atomic absorption spectrometry after pre-concentration with a simple ionic liquid-based dispersive liquid-liquid micro-extraction methodology

Open Chemistry ◽

10.2478/s11532-010-0030-2 ◽

2010 ◽

Vol 8 (3) ◽

pp. 617-625 ◽

Cited By ~ 18

Author(s):

Hossein Abdolmohammad-Zadeh ◽

Elnaz Ebrahimzadeh

Keyword(s):

Ionic Liquid ◽

Atomic Absorption Spectrometry ◽

Atomic Absorption ◽

Water Samples ◽

Limit Of Detection ◽

Absorption Spectrometry ◽

Experimental Conditions ◽

Flame Atomic Absorption ◽

Relative Standard

AbstractA rapid dispersive liquid-liquid micro-extraction (DLLME) methodology based on the application of 1-hexylpyridinium hexafluorophosphate [C6py][PF6] ionic liquid (IL) as an extractant solvent was applied for the pre-concentration of trace levels of cobalt prior to determination by flame atomic absorption spectrometry (FAAS). 1-Phenyl-3-methyl-4-benzoyl-5-pyrazolone (PMBP) was employed as a chelator forming a Co-PMBP complex to extract cobalt ions from aqueous solution into the fine droplets of [C6py][PF6]. Some effective factors that influence the micro-extraction efficiency include the pH, the PMBP concentration, the amount of ionic liquid, the ionic strength, the temperature and the centrifugation time which were investigated and optimized. In the optimum experimental conditions, the limit of detection (3s) and the enrichment factor were 0.70 µg L−1 and 60, respectively. The relative standard deviation (RSD) for six replicate determinations of 50 µg L−1 Co was 2.36%. The calibration graph using the pre-concentration system was linear at levels 2–166 µg L−1 with a correlation coefficient of 0.9982. The applicability of the proposed method was evaluated by the determination of trace amounts of cobalt in several water samples.

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