Determination of ascorbic acid by a modified multiwall carbon nanotube paste electrode using cetrimonium iodide/iodine

Noroozifar, Meissam; Khorasani-Motlagh, Mozhgan; Tavakkoli, Hamed

doi:10.3906/kim-1110-54

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…The oxidation peak of ascorbic acid has occurred at 0.28 V, while the detection limits have been quite low [ 128 ]. Pharmaceutical formulations and foods have been studied with a combination of cyclic voltammetry and differential pulse voltammetry, with a carbon paste electrode molded with multi-walled carbon nanotubes and graphite in acidic solution with pH = 2 [ 129 ]. The successful determination of ascorbic acid in commercial samples has also been done with cyclic voltammetry, using bare carbon paste electrodes (PCPEs) and molded carbon paste electrodes (MCPEs) with calixarenes, such as p-tert-butylcalix(4)arene, in ammonium acetate (pH = 5) containing Pb 2+ ions [ 130 ].…”

Section: Vitamin Analysis Using Electroanalytical Techniquesmentioning

confidence: 99%

Different Aspects of the Voltammetric Detection of Vitamins: A Review

Kiamiloglou,

Girousi

2023

Biosensors

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Vitamins comprise a group of organic chemical compounds that contribute significantly to the normal functioning of living organisms. Although they are biosynthesized in living organisms, some are also obtained from the diet to meet the needs of organisms, which is why they are characterized as essential chemical compounds. The lack, or low concentrations, of vitamins in the human body causes the development of metabolic dysfunctions, and for this reason their daily intake with food or as supplements, as well as the control of their levels, are necessary. The determination of vitamins is mainly accomplished by using analytical methods, such as chromatographic, spectroscopic, and spectrometric methods, while studies are carried out to develop new and faster methodologies and techniques for their analysis such as electroanalytical methods, the most common of which are voltammetry methods. In this work, a study is reported that was carried out on the determination of vitamins using both electroanalytical techniques, the common significant of which is the voltammetry technique that has been developed in recent years. Specifically, the present review presents a detailed bibliographic survey including, but not limited to, both electrode surfaces that have been modified with nanomaterials and serve as (bio)sensors as well as electrochemical detectors applied in the determination of vitamins.

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Section: Vitamin Analysis Using Electroanalytical Techniquesmentioning

confidence: 99%

Different Aspects of the Voltammetric Detection of Vitamins: A Review

Kiamiloglou,

Girousi

2023

Biosensors

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“…For example, the groundwater iodine concentration level in the North China Plain varies between 1.51 μg/L and 1106 μg/L, and 32.3% of groundwater iodine is higher than the guidelines for drinking water . Iodine is also used in chemical synthesis, which ends up in industrial wastewater, and the iodometric method is applied in the detection of analysts such as sulfide hydrogen, glucose, and organic peroxides. , Sensing of iodide (I – ) in surrounding environments and chemical samples is necessary because of its crucial roles in chemical and biological processes.…”

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confidence: 99%

Mixing-to-Answer Iodide Sensing with Commercial Chemicals

et al. 2018

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We develop a convenient, colorimetric assay (Au/PEI) for rapid iodide (I) determination that can be prepared facilely by mixing commercially available chemicals including tetrachloroauric acid (HAuCl) and poly(ether imide) (PEI), and the assay can be carried out directly by adding the samples to the assay without any pretreatment and additional procedure. Au/PEI operates on the principle that I accelerates the formation of Au NPs, which leads to a visible color change from light yellow to red for naked-eye readout with high specificity. We integrate our assay on solid devices including gel hybrids (Au/PEI/GH) and filter paper (Au/PEI paper) to satisfy the demand of point-of-care testing and justify the practicality by detecting I in lake water that was supplemented with 10, 20, or 40 μM of I. Au/PEI/GH with the limit of detection of 0.35 μM can satisfy the detection of drinking water based on the guidelines (1.2 μM) set by the Chinese government, and Au/PEI paper can be used even after 1 year of storage. Such assays provide a convenient and straightforward choice for routine, on-site I tests.

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