Electrocatalytic Application of Girard's Reagent T to Simultaneous Determination of Furaldehydes in Pharmaceutical and Food Matrices by Highly Sensitive Voltammetric Methods

Shamsipur, Mojtaba; Beigi, Ali Akbar Miran; Teymouri, Mohammad; Tash, Shahram Abolhassan; Samimi, Vahid

doi:10.1002/elan.200900600

Cited by 13 publications

(8 citation statements)

References 37 publications

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“…Sensing is based on the electrochemical activity of 2-FAL, which is reduced to furfuryl alcohol at potentials around 1–1.5 V. While this reaction is well known at the mercury electrode, it has been claimed that it does not takes place at other electrodes such as the glassy carbon (GC) and bare carbon paste electrode (CPE) [39]. In the present work, screen printed cells (SPCs) with graphite ink working electrode have been considered as the electrochemical platform for their reproducibility and low cost.…”

Section: Resultsmentioning

confidence: 99%

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Sensing by Molecularly Imprinted Polymer: Evaluation of the Binding Properties with Different Techniques

Pesavento

Marchetti

Maria

et al. 2019

Sensors

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The possibility of investigating the binding properties of the same molecularly imprinted polymer (MIP), most probably heterogeneous, at various concentration levels by different methods such as batch equilibration and sensing, is examined, considering two kinds of sensors, based respectively on electrochemical and surface plasmon resonance (SPR) transduction. As a proof of principle, the considered MIP was obtained by non-covalent molecular imprinting of 2-furaldehyde (2-FAL). It has been found that different concentration ranges of 2-FAL in aqueous matrices can be measured by the two sensing methods. The SPR sensor responds in a concentration range from 1 × 10−4 M down to about 1 × 10−7 M, while the electrochemical sensor from about 5 × 10−6 M up to about 9 × 10−3 M. The binding isotherms have been fit to the Langmuir adsorption model, in order to evaluate the association constant. Three kinds of sites with different affinity for 2-FAL have been detected. The sites at low affinity are similar to the interaction sites of the corresponding NIP since they have a similar association constant. This is near to the affinity evaluated by batch equilibration too. The same association constant has been evaluated in the same concentration range. The sensing methods have been demonstrated to be very convenient for the characterization of the binding properties of MIP in comparison to the batch equilibration, in terms of reproducibility and low amount of material required for the investigation.

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Section: Resultsmentioning

confidence: 99%

“…The MIP layer used in all these devices is easily and rapidly prepared, so it is particularly suitable to be used for rapid characterization purposes. The sensor developed in this investigation gives a voltammetric signal, generated by the substrate itself, i.e., 2-FAL, which is electroactive [39].…”

Section: Introductionmentioning

confidence: 99%

Sensing by Molecularly Imprinted Polymer: Evaluation of the Binding Properties with Different Techniques

Pesavento

Marchetti

Maria

et al. 2019

Sensors

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“…On the other hand, the RP-HPLC determination is more accurate than the spectrophotometric ones but it is quite slow. In addition to these, other procedures based on separation techniques, such as RP-HPLC-UV [21] or micellar electrokinetic capillary chromatography (MEKC) [22], electrochemical methods, such as differential pulse polarography (DPP) [23] and square wave voltammetry (SWV) [24,25], or sensors [26,27] were used. Spectroscopic approaches were also reported, including a Winkler-based automated flow injection protocol [28] or a recent method based on the HMF derivatization with the Seliwanoff reagent [29].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Determination of the “Furanic Index” in Honey

et al. 2021

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5-(hydroxymethyl)furan-2-carbaldehyde, better known as hydroxymethylfurfural (HMF), is a well-known freshness parameter of honey: although mostly absent in fresh samples, its concentration tends to increase naturally with aging. However, high quantities of HMF are also found in fresh but adulterated samples or honey subjected to thermal or photochemical stresses. In addition, HMF deserves further consideration due to its potential toxic effects on human health. The processes at the origin of HMF formation in honey and in other foods, containing saccharides and proteins—mainly non-enzymatic browning reactions—can also produce other furanic compounds. Among others, 2-furaldehyde (2F) and 2-furoic acid (2FA) are the most abundant in honey, but also their isomers (i.e., 3-furaldehyde, 3F, and 3-furoic acid, 3FA) have been found in it, although in small quantities. A preliminary characterization of HMF, 2F, 2FA, 3F, and 3FA by cyclic voltammetry (CV) led to hypothesizing the possibility of a comprehensive quantitative determination of all these compounds using a simple and accurate square wave voltammetry (SWV) method. Therefore, a new parameter able to provide indications on quality of honey, named “Furanic Index” (FI), was proposed in this contribution, which is based on the simultaneous reduction of all analytes on an Hg electrode to ca. −1.50 V vs. Saturated Calomel Electrode (SCE). The proposed method, validated, and tested on 10 samples of honeys of different botanical origin and age, is fast and accurate, and, in the case of strawberry tree honey (Arbutus unedo), it highlighted the contribution to the FI of the homogentisic acid (HA), i.e., the chemical marker of the floral origin of this honey, which was quantitatively reduced in the working conditions. Excellent agreement between the SWV and Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) data was observed in all samples considered.

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“…It is widely used in the fields of pharmaceutical, chemical and food industry, for example as an industrial solvent, a selective extractant and being used to manufacture resins, detergents, pesticides and flavors, etc [3]. Negatively, furfural is irritating to the skin, eyes, mucous membranes and respiratory tract [4]. Meanwhile, it is carcinogenic and genotoxic when being intaken in excess [5].…”

Section: Introductionmentioning

confidence: 99%

Black Phosphorene Modified Electrochemical Sensor for Fast Determination of 5‐Hydroxymethyl‐2‐furfural in Milk

Huang

Weng

et al. 2021

Electroanalysis

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The fast detection of 5‐hydroxymethyl‐2‐furfural (HMF) in food industry is vital because of its toxicity and mutagenicity. A glassy carbon electrode (GCE) modified with black phosphorene (BP) nanosheets was prepared and coated with Nafion to improve stability. The electrode has excellent electrochemical stability and current response for HMF electroreduction. The good linear relationship is in the concentration range of 0.1–10 μg/mL with the detection limit of 0.012 μg/mL. HMF electroreduction is a diffusion‐controlled process involving two electrons and two protons. The sensor was successfully applied to the measurement of HMF in milk with the recovery values of 92.92 %–96.33 %.

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Electrocatalytic Application of Girard's Reagent T to Simultaneous Determination of Furaldehydes in Pharmaceutical and Food Matrices by Highly Sensitive Voltammetric Methods

Cited by 13 publications

References 37 publications

Sensing by Molecularly Imprinted Polymer: Evaluation of the Binding Properties with Different Techniques

Sensing by Molecularly Imprinted Polymer: Evaluation of the Binding Properties with Different Techniques

Electrochemical Determination of the “Furanic Index” in Honey

Black Phosphorene Modified Electrochemical Sensor for Fast Determination of 5‐Hydroxymethyl‐2‐furfural in Milk

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