Carbon nanotubes for voltammetric determination of sulphite in some beverages

Silva, Erika M.; Takeuchi, Regina M.; Santos, André L.

doi:10.1016/j.foodchem.2014.10.106

Cited by 65 publications

(23 citation statements)

References 32 publications

(55 reference statements)

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“…Figure 8B illustrates the DPV signals obtained by measuring 50 µM of NFT which is stored at room temperature. The results disclose that a reduction peak current response is only 3% even after a week which continued till one month, stating good storage capability of the proposed sensor 44,45 . Continuing, to the proposed sensor NiFe/f-MWCNT is checked with 8 multiple measurements using a similar electrode for better repeatability enhancement analysis.…”

Section: Effect Of Ph Concentration and Scan Rate For Nftmentioning

confidence: 86%

Nano assembly of NiFe spheres anchored on f-MWCNT for electrocatalytic reduction and sensing of nitrofurantoin in biological samples

Hwa

Sharma

2020

Sci Rep

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The current study reports a facile simple, low-cost electrochemical sensor in the detection of nitrofurantoin (nft) by using nife/f-MWcnt hybrid composite as a promising electrocatalyst. nft is an antibiotic drug that is extensively using in pharmaceuticals and also in animal food production which causes a severe threat for both human and animal environments. extending the residues of NFT are left into rivers, soils, lakes, and groundwaters either found or discharged leading health issues. to this nife/f-MWcnt composite was synthesized using a hydrothermal mechanism and then ultrasonicated to form a hybrid composite for catalytic evaluation and electrochemical detection of NFT for the very first time. Furthermore, the physicochemical properties of NiFe nanospheres conjugated on f-MWcnt are scrutinized using various analytical and spectroscopical techniques. Resulting transmission electron microscopy (TEM) displays a chain like NiFe nanospheres anchored on f-MWCNT with a well-defined spherical shape, without any comprehensive agglomeration. The NiFe/f-MWcnt screen printed carbon paste electrode (Spce) displayed an excellent electrocatalytic activity for NFT with a LOD of 0.03 µM and a sensitivity of 11.45 µA µM −1 cm −2. establishing a new selectivity and with the existence of co-interfering compounds. to enhance the practical abilities analysis were performed in Human serum and urine samples which resulted in satisfactory recoveries with high precision and linear accuracy illustrated in Scheme 1. Nitrofurantoin [(NFT)-N-(5-nitro-2-furfurylidene)-1-aminohydantoin], a well-known antimicrobial drug that has shown to actively inhibit several gram-positive as well as gram-negative microbes which belong to the family of nitrofuran 1,2. This drug also has great importance in veterinary medicine in the prevention and treatment of coccidiosis that occurs in poultry and livestock 3,4. It has also been associated with patients of neuropathy, hepatitis, pulmonary fibrosis, and hemolytic anemia suffering from the deficiency of glucose-6-phosphate 5. Despite having such excellent antimicrobial activity, NFT showed some amount of metabolic toxicity 6. The antimicrobial activity of NFT might owe to the fact that 5-nitro function undergoes reductive metabolic activation to form hydroxylamine derivatives, nitroso derivatives, and anion radical which includes a reduction mechanism of the nitro group (-NO 2) 7,8. Basically, the nitrofuran family consists of furaltadone, furazolidone, difurazone, nifurtoniol, nitrofurazone, nifuroxazide, and nitrofurantoin. Conspicuously, within a single daily oral dose usage, NFT gets partially metabolized where 25-50% is excreted as its original state with 1-2% excretes through urine in the form of aminofurantoin 9. NFT also has the versatile ability in generating reactive species of oxygen and NO through its nitro group reduction. Where, by all these factors NFT is vividly released into environmental habitats making the contamination in the ecosystem, even at a quite low amount of level it is harm...

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Section: Effect Of Ph Concentration and Scan Rate For Nftmentioning

confidence: 86%

Nano assembly of NiFe spheres anchored on f-MWCNT for electrocatalytic reduction and sensing of nitrofurantoin in biological samples

Hwa

Sharma

2020

Sci Rep

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“…The LOD was 0.06 mg/kg expressed as sulfur dioxide. Silva et al (2015) presented a squarewave voltammetric method based on sulfite electrochemical reduction using a carbon-paste electrode chemically modified with multiwalled carbon nanotubes for the quantification of sulfites in commercial beverages. The method is not applicable to red grape juice or red wine samples.…”

Section: Flow Injection Analysis (Fia)mentioning

confidence: 99%

Scientific Opinion on the re‐evaluation of sulfur dioxide (E 220), sodium sulfite (E 221), sodium bisulfite (E 222), sodium metabisulfite (E 223), potassium metabisulfite (E 224), calcium sulfite (E 226), calcium bisulfite (E 227) and potassium bisulfite (E 228) as food additives

Reculusa

Arbault

2016

EFS2

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The EFSA Panel on Food Additives and Nutrient Sources added to Food (ANS) was asked to deliver a scientific opinion re‐evaluating sulfur dioxide (E 220), sodium sulfite (E 221), sodium bisulfite (E 222), sodium metabisulfite (E 223), potassium metabisulfite (E 224), calcium sulfite (E 226), calcium bisulfite (E 227) and potassium bisulfite (E 228) when used as food additives. The Panel noted that sulfur dioxide, bisulfite and sulfite ions existed in a series of equilibria and that these would favour bisulfite ions at the pH of the stomach and sulfite ions at physiological pHs. Therefore, it was considered that once ingested, based on their capacity to form sulfite ions, read across between the different sulfite sources is possible; however, the Panel noted the uncertainties about the reactivity of sulfites in different foods and the resulting reaction products. The overall limited database did not indicate any concern for genotoxicity and did not report any effect in the available chronic, carcinogenicity and reprotoxicity studies after oral exposure in the diet, by gavage, or in the drinking water. A no observed adverse effect level (NOAEL) of 70 mg SO2 equivalent/kg body weight (bw) per day was identified from a long‐term toxicity study in rats. However, the Panel noted several uncertainties and limitations in the database and concluded that the current group acceptable daily intake (ADI) of 0.7 mg SO2 equivalent/kg bw per day (derived using a default uncertainty factor) would remain adequate but should be considered temporary while the database was improved. The Panel recommended that the database and the temporary group ADI should be re‐evaluated and noted that the recommended studies could require 5 years for completion. The Panel further concluded that exposure estimates to sulfur dioxide and sulfites were higher than the group ADI of 0.7 mg SO2 equivalent/kg bw per day for all population groups.

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“…This electrode has a 0.6 µM detection limit and a strong anti-interference ability. On the other hand, carbon paste electrodes modified with carbon nanotubes 19 were used for voltammetric detection of sulfite in commercial beverages with a limit of detection of 1.0 mg SO 2 L -1 . On the other hand, glassy carbon electrodes modified with switching structures of praseodynium hexacyanoferrate show very good electrocatalytic behavior toward the oxidation of sulfite 20 .…”

Section: Introductionmentioning

confidence: 99%

Electrooxidation of Sulfite at Carbon Paste Electrode Modified With Ionic Liquids Derivated of N-Octyl-Pyridinium Hexafluorophosphate With Different Substituents in the Cation

Fuenzalida

Rosales

García

et al. 2017

J. Chil. Chem. Soc.

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Carbon paste electrodes modified with a family of ionic liquids (as binders) derived from N-octyl-pyridinium hexafluorophosphate, (composite-ionic liquid electrodes (CILEs)) were studied toward the oxidation of sulfite as an inner-sphere probe reaction and compared to a conventional carbon paste electrode (CPE) in which the binder was mineral oil. The ionic liquids were modified at para-position with substituents that are electron withdrawing: -CN (CILE/CN) and -CF 3 (CILE/CF 3 ) and substituents that are electron donating: -CH 3 (CILE/CH 3 ) and -OCH 3 (CILE/OCH 3 ), and compared with the ionic liquid without substituents (CILE/OPy). The results showed that CILEs are capable of catalyzing the sulfite oxidation, shifting the oxidation potential to more negative values compared to CPE. Also, they showed linear correlations between increasing sulfite concentration and increasing current density. The best system in terms of sensitivity was the electrode modified with the 4-methyl-N-octylpyridiniumhexafluorophosphate CILE/CH 3 and, then, that modified with the non-substituted ionic liquid CILE/OPy measured by amperometry. In terms of potential, the best systems are the CILEs modified with ILs with inductive-substituents, -CH 3 and -CF 3 and OPy, indicating that the delocalization of the charge of the cation produced by the mesomeric-substituent (-OCH 3 , -CN) diminishes the electrocatalytic behavior of these binders for that oxidation. On the other hand, the analytical parameters of all the amperometric sensors studied here (all CILEs excepts CILE/OCH 3 ) are good enough to be applied in food industry for samples without polyphenols at concentrations higher than ca. 1mM of sulfite. Their stability is very high (at least 100 cycles after obtaining a stable response without changing its current, exposed to air and humidity) and they can be used to remove sulfite from wastewaters. Finally, to our knowledge, there are not comparative studies about the effect of changing the substituent of the cation in electrocatalysis of modified IL-electrodes.

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Carbon nanotubes for voltammetric determination of sulphite in some beverages

Cited by 65 publications

References 32 publications

Nano assembly of NiFe spheres anchored on f-MWCNT for electrocatalytic reduction and sensing of nitrofurantoin in biological samples

Nano assembly of NiFe spheres anchored on f-MWCNT for electrocatalytic reduction and sensing of nitrofurantoin in biological samples

Scientific Opinion on the re‐evaluation of sulfur dioxide (E 220), sodium sulfite (E 221), sodium bisulfite (E 222), sodium metabisulfite (E 223), potassium metabisulfite (E 224), calcium sulfite (E 226), calcium bisulfite (E 227) and potassium bisulfite (E 228) as food additives

Electrooxidation of Sulfite at Carbon Paste Electrode Modified With Ionic Liquids Derivated of N-Octyl-Pyridinium Hexafluorophosphate With Different Substituents in the Cation

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