Development of a biomimetic sensor for selective identification of cyanide

Figueira, Eduardo Carneiro; Neres, Lucas C. S.; Ruy, Mayara R. S.; Troiano, G. F.; Sotomayor, Marı́a Del Pilar Taboada

doi:10.1039/c6ay01830k

Cited by 10 publications

(3 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As can be observed in the inlays of Figure 2, in this case we have a mostly diffusional process, thus, due to the irregular surface some quasi adsorptive processes might be found to be occurring in simultaneous. The peak potential corresponding to TCP was around 0.0 V versus Ag|AgCl, and the peak present at −0.5 V versus Ag|AgCl corresponds to the oxidation of the metallic complex as can be found in literature [22].…”

Section: Resultssupporting

confidence: 56%

Modified carbon paste electrode for the electrochemical sensing of 3,5,6-trichloro-2-pyridinol

Santos

Batista

Gonçalves

et al. 2017

International Journal of Environmental Analytical Chemistry

View full text Add to dashboard Cite

An electrochemical sensor for the determination of 3,5,6-trichloro-2-pyridinol (TCP), the main metabolite of the pesticide chlorpyrifos, was herein developed. TCP has greater solubility than the source pesticide, and its occurrence in ground and surface water is more frequent and more dangerous. The sensor was fabricated using carbon paste modified with the inorganic complex chloro-5,10,15,20-tetrakis-(pentafluorophenyl)-21 H,23 H-porphyrin iron(III) (FeTPPCl); this metallic complex has a chemical core structure similar to the heme cofactor of the cytochrome P450 (CYPs). Measurements were performed with square-wave voltammetry. Using the optimised voltammetric parameters and without any sample preparation, the sensor showed a limit of detection of 2.8 mg L −1 (14 μmol L −1 ), recoveries ca. 102%, suitable selectivity and long durability (over 1 month).

show abstract

Section: Resultssupporting

confidence: 56%

Modified carbon paste electrode for the electrochemical sensing of 3,5,6-trichloro-2-pyridinol

Santos

Batista

Gonçalves

et al. 2017

International Journal of Environmental Analytical Chemistry

View full text Add to dashboard Cite

show abstract

“…Once the detection of the CN − was confirmed, tests were performed to evaluate the sensitivity range of the Fe-S-TiO 2 -nanotube-based sensor. Different electrochemical techniques can be used to investigate the sensor sensitivity, and these include cyclic voltammetry, 39,40 differential pulse voltammetry, 41,42 square wave voltammetry 41,43 and amperometry. 44 Amperometry was selected for sensitivity analysis in this work as it provides better resolution when compared to other methods.…”

Section: Resultsmentioning

confidence: 99%

TiO₂ Nanotube-Based Sensor for the Detection of Cyanide in Water

Tembo

Dhabarde

Subramanian

2021

J. Electrochem. Soc.

View full text Add to dashboard Cite

Cyanide is an acutely toxic compound capable of spreading to ground and surface waters more easily than other industrial contaminants. Real-time monitoring of cyanide concentrations calls for a robust and quick method for cyanide detection in water. This work focuses on the application of anodized titanium dioxide (TiO2) nanotubes as a substrate, with suitable and relatively inexpensive additives, for the sensitive and selective electrochemical detection of cyanide in water. The TiO2 nanotubes were modified by the addition of iron (Fe) and sulfur (S) as sensing elements. Characterization of the prepared sensing platform was performed using X-ray diffraction and electron microscopy. Current-time measurements indicated that i) increasing cyanide concentration can perturb the current proportionally, ii) the differential in the current can be used as a calibration for quantitative detection of cyanide, and iii) the sensor is highly selective even in the presence of interfering species. A cyanide detection limit of 0.49 μM and a sensitivity of −13.8 mAcm−2 μM−1 were established. The sensor response indicated that an Fe-S-TiO2 nanotube sensing electrode could effectively and repeatedly be used over a period of several months for the sensing of cyanide concentrations lower than the recommended WHO and USEPA limits in water.

show abstract

“…Different techniques were used to detect cyanide such as voltammetry [ 22 , 23 ], ion chromatography [ 24 ], colorimetric [ 25 , 26 , 27 , 28 ], and UV-vis and fluorescence [ 12 , 17 , 29 , 30 , 31 , 32 , 33 , 34 ]. UV-vis and fluorescence techniques present many advantages such as immediate easy detection, low cost, high sensitivity and quantification of the anions in different solvent systems including biological systems [ 35 ].…”

Section: Introductionmentioning

confidence: 99%

Substituted 2-Aminobenzothiazoles Salicylidenes Synthesis and Characterization as Cyanide Sensors in Aqueous Medium

Elsafy

Al-Easa

2018

Sensors

View full text Add to dashboard Cite

(E)-2-((benzo[d]thiazol-2-ylimino)methyl)-4-nitrophenol 1 and (E)-2-(((6-methoxybenzo[d]thiazol-2-yl)imino)methyl)-4-nitrophenol 2 were synthesized efficiently under microwave conditions. The structures were confirmed using IR, 1H NMR, and 13C NMR. UV-vis. Fluorescence investigations demonstrated that 1 and 2 are sensitive and selective sensors for detection of cyanide over all other anions SCN−, AcO−, N3−, H2PO4−, H2AsO4−, F−, Cl−, Br−, and I− in aqueous media. Cyanide induces colorimetric change from pale yellow to dark yellow and from transparent to pale yellow for 1 and 2, respectively. It enhances the absorption at wavelengths 385 nm and 425 nm of 1 and 385 nm and 435 nm of 2. Acidic anions H2PO4− and H2AsO4− displayed significant interference with the interaction of cyanide and sensors 1 and 2. Sensor 1 has lower detection limit (LDL) 1 × 10−6 M, while 2 has LDL 1.35 × 10−6 M.

show abstract

Development of a biomimetic sensor for selective identification of cyanide

Abstract: A biomimetic sensor is proposed as a promising new analytical method for the determination of cyanide in different samples.

Cited by 10 publications

References 51 publications

Modified carbon paste electrode for the electrochemical sensing of 3,5,6-trichloro-2-pyridinol

Modified carbon paste electrode for the electrochemical sensing of 3,5,6-trichloro-2-pyridinol

TiO₂ Nanotube-Based Sensor for the Detection of Cyanide in Water

Substituted 2-Aminobenzothiazoles Salicylidenes Synthesis and Characterization as Cyanide Sensors in Aqueous Medium

Contact Info

Product

Resources

About

Development of a biomimetic sensor for selective identification of cyanide

Abstract: A biomimetic sensor is proposed as a promising new analytical method for the determination of cyanide in different samples.

Cited by 10 publications

References 51 publications

Modified carbon paste electrode for the electrochemical sensing of 3,5,6-trichloro-2-pyridinol

Modified carbon paste electrode for the electrochemical sensing of 3,5,6-trichloro-2-pyridinol

TiO2 Nanotube-Based Sensor for the Detection of Cyanide in Water

Substituted 2-Aminobenzothiazoles Salicylidenes Synthesis and Characterization as Cyanide Sensors in Aqueous Medium

Contact Info

Product

Resources

About

TiO₂ Nanotube-Based Sensor for the Detection of Cyanide in Water