Ionic liquid based high performance electrochemical sensor for ascorbic acid in various foods and pharmaceuticals

Bhajanthri, Natesh Kumar; Arumugam, V.; Chokkareddy, Rajasekhar; Redhi, Gan G.

doi:10.1016/j.molliq.2016.07.061

Cited by 42 publications

(14 citation statements)

References 39 publications

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“…The generated free electrons are improved the conductance of the sensing medium as well as the electrochemical response. The similar electrochemical oxidation process of AA acid as in Scheme 1 has been reported by previous authors [76,77]. At the beginning of the oxidation process, the small surface coverage on the surface of working electrode due to adsorption of few molecules of AA is perceived and the corresponding reaction is progressed.…”

Section: Electrochemical Sensing Performances Of Sensor With Cdo/sno supporting

confidence: 75%

Selective detection of ascorbic acid with wet-chemically prepared CdO/SnO2/V2O5 micro-sheets by electrochemical approach

et al. 2020

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Generally, ascorbic acid (AA) is a potent reducing and antioxidant agent that regulates in fighting against bacterial infections as well as detoxifying reactions, which is functioned in the formation of collagen in fibrous tissue, teeth, bones, connective tissue, skin, and capillaries. Up to date, electrochemical enzymatic sensor are significantly used for enzymatic AA detection that exhibits an excellent selectivity, high reliability and handled under physiological conditions. However, considering some intrinsic disadvantages of using enzymes, such as high fabrication cost and poor stability, non-enzymatic AA sensors have attracted increasing research interest in recent years owing to their low cost, high stability, fast response, and low detection limit. Moreover, the development of nanotechnology has also offered new opportunities to develop the nanostructured sensor probes for enzyme-less AA sensing applications. With beneficial advantages, ternary-doped metal oxides have gathered an extensive effort in the development of cost-effective sensors with high stability, sensitivity and quick response for the determination of selective AA by enzyme-free detection. In this approach, the mixed metal oxides of CdO/SnO 2 /V 2 O 5 micro-sheets (MSs) were prepared by facile wet-chemical method in alkaline phase at low temperature. Later, it was subjected to detail characterize by using various methods such as XPS, FESEM, EDS, and XRD. The slurry of prepared MSs in ethanol was deposited initially onto the surface of glassy carbon electrode (GCE) to make a thin film with conducting nafion (5% suspension in ethanol) adhesive to result the working electrode of proposed AA sensor probe. The sensor sensitivity (21.3354 μA μM −1 cm −2) is calculated by using the slope (0.6742 μA μM −1) of the calibration curve by considering the active surface area of GCE (0.0316 cm 2) in the linear dynamic range (LDR; 0.1 nM to 0.01 mM). The limit of detection (LOD) (98.64 ± 4.98 pM) is obtained from the calibration curve. The proposed AA electrochemical sensor exhibits short response time, good reproducibility and successive outcome during the investigation of the real biological samples. The development of enzyme-free AA sensor by using CdO/ SnO 2 /V 2 O 5 MSs onto GCE is simple as well as reliable and practically able to detect the biological stuffs for the safety of human health in the field of biomedical and sensor technology.

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Section: Electrochemical Sensing Performances Of Sensor With Cdo/sno supporting

confidence: 75%

Selective detection of ascorbic acid with wet-chemically prepared CdO/SnO2/V2O5 micro-sheets by electrochemical approach

et al. 2020

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“…The electrochemical technique presented here was compared with those previously reported for the quantification of AA . As shown in Table , coupling differential pulse voltammetry with single‐drop microextraction resulted in considerably lower LOD as well as comparable width of linear range.…”

Section: Resultsmentioning

confidence: 99%

Magnetic ionic liquid assisted single‐drop microextraction of ascorbic acid before its voltammetric determination

Jahromi

Mostafavi

Shamspur

et al. 2017

J of Separation Science

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For the first time, we coupled a microextraction technique using a magnetic ionic liquid with voltammetric determination. A hydrophobic magnetic ionic liquid that contains the tetrachloromanganate(II) anion, namely, aliquat tetrachloromanganate(II), was synthesized and used for the extraction of ascorbic acid from aqueous solutions followed by voltammetric determination. The extraction procedure was carried out using a single drop microextraction technique in which the ascorbic acid containing magnetic ionic liquid was separated with a magnet and then cast onto the surface of a carbon paste electrode modified with TiO nanoparticles for the voltammetric quantification of the extracted ascorbic acid. Electrochemical quantification was carried out in a blank phosphate buffer solution. After optimizing different experimental conditions, a linear concentration range of 1.50-40.0 nM with a detection limit of 0.43 nM was obtained for the determination of ascorbic acid. The presented approach was successfully applied to the determination of ascorbic acid in samples of vitamin C effervescent tablets and orange juice.

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“…These results note that the use of ILs influence the compatibility, enhancement and enable effective electron transfer over several redox molecules [20]. The novelty of f-MWCNTs based electrochemical sensors are sought due to the exclusive geometrical, electronic and automatic properties of MWCNTs [21,22]. The f-MWCNTs and metal oxide nanoparticles are good electro active species for the redox reactions [23].…”

Section: Introductionmentioning

confidence: 92%

Ionic Liquid and f‐MWCNTs Fabricated Glassy Carbon Electrode for Determination of Amygdalin in Apple Seeds

Chokkareddy

2020

Electroanalysis

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This work proposes a novel electrochemical sensor based on functionalised multiwalled carbon nanotubes (f-MWCNTs), zinc oxide nanoparticles (ZnONPs), and (methyltrioctylammonium chloride ionic liquid (IL)) fabricated glassy carbon electrode (GCE), for the determination of amygdalin (AMY) in apple seeds. X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), Fourier-transform infrared spectroscopy (FT-IR), Transmission electron microscopy (TEM), Thermogravimetric analysis (TGA) as well as electrochemical impedance spectroscopy (EIS) techniques were used to characterize the synthesized ZnONPs and its nanocomposite. EIS and differential Pulse Voltammetry (DPV) was utilized to investigate the electrochemical behavior of AMY on the IL-ZnONPs-f-MWCNTs nanocomposite modified GCE. The linear range response is obtained from 0.012-6 μM for AMY determination under optimized experimental conditions, and the limit of detection (LOD) values were found to be 0.012 μM. The novel method developed was successfully used to determine AMY in spiked apple seed samples with satisfactory results.

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Ionic liquid based high performance electrochemical sensor for ascorbic acid in various foods and pharmaceuticals

Cited by 42 publications

References 39 publications

Selective detection of ascorbic acid with wet-chemically prepared CdO/SnO2/V2O5 micro-sheets by electrochemical approach

Selective detection of ascorbic acid with wet-chemically prepared CdO/SnO2/V2O5 micro-sheets by electrochemical approach

Magnetic ionic liquid assisted single‐drop microextraction of ascorbic acid before its voltammetric determination

Ionic Liquid and f‐MWCNTs Fabricated Glassy Carbon Electrode for Determination of Amygdalin in Apple Seeds

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