Reference Electrodes in Metal Corrosion

Szabó, S.; Bakos, I.

doi:10.1155/2010/756950

Cited by 14 publications

(7 citation statements)

References 45 publications

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“…In an equilibrium system, the OCP value of the gold electrode will remain stable; however, when the oxidation products dissolve (in addition to oxygen from the air), changes in OCP of the gold electrode will occur over time. The OCP variation will be related to the kinetics of the redox processes and the concentration of the dissolved species [41][42][43].…”

Section: Stability Of the Rawmentioning

confidence: 99%

Oil Extraction from “Morelos Rice” Bran: Kinetics and Raw Oil Stability

Zuñiga-Díaz

Reyes-Dorantes

Quinto-Hernandez

et al. 2017

Journal of Chemistry

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“Morelos rice” is a variety of rice with certificate of denomination of origin. It is a large grain of opaque appearance and extra large size that is grown exclusively in Morelos state (Mexico). Thus, the quality and characteristics of its rice bran may affect the kinetic of the extraction process of its oil as well as its stability. Therefore, this work is oriented to determine the extraction kinetics of its oil and its oxidative stability. The latter one is obtained through the proposal of a method based on open-circuit potential measurements. The results showed that the rice bran has 21.44% of raw oil, with a chemical composition (based on fatty acids) of 48.48% oleic acid, 35.26% linoleic acid, and 14.54% palmitic acid, as well as a free fatty acid content of 8.15%. A high percentage of its oil content can be recovered in a short time at room temperature, and its extraction kinetics is a function of both the washing and the diffusion of its oil. Under storage conditions the raw oil has a high stability, at least 8 months, and its oxidative stability was of 24, 9, and 7 hours at 50°C, 80°C, and 110°C, respectively.

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Section: Stability Of the Rawmentioning

confidence: 99%

Oil Extraction from “Morelos Rice” Bran: Kinetics and Raw Oil Stability

Zuñiga-Díaz

Reyes-Dorantes

Quinto-Hernandez

et al. 2017

Journal of Chemistry

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“…So, Ag + ion adsorption is dominated by chloride of the gel. Owing to the standard reduction potential of silver (I) metal (+0.80 V at 25 °C), It may show prior attraction toward the organic halides …”

Section: Resultsmentioning

confidence: 99%

Pectin‐[(3‐acrylamidopropyl) trimethylammonium chloride‐co‐acrylic acid] hydrogel prepared by gamma radiation and selectively silver (Ag) metal adsorption

Bhuyan

Okabe

Hidaka

et al. 2017

J of Applied Polymer Sci

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Pectin‐[(3‐acrylamidopropyl) trimethylammonium chloride‐co‐acrylic acid] hydrogel has been prepared from the aqueous blend solution of pectin, (3‐acrylamidopropyl) trimethylammonium chloride (APTAC), and acrylic acid (AAc) by applying gamma radiation of different doses (1–25 kGy) from 60Co gamma source. The hydrogels were characterized by equilibrium swelling, Fourier transform infrared, differential scanning calorimetry, and scanning electron microscopy. The hydrogels were used in multielement adsorption and it was found that pectin‐(APTAC‐co‐AAc) gel is highly selective toward silver (I) ion among 27 metal ions. The data obtained from equilibrium adsorption studies were fitted in Langmuir and Freundlich adsorption isotherm models and model parameters evaluated. The maximum adsorption capacity of pectin‐(APTAC‐co‐AAc) gel was found to be 67.6413 mg/g of dry gel at sample volume of 25 mL. The kinetic data were tested using pseudo‐first order and pseudo‐second order kinetic models and different adsorption diffusion models such as film diffusion and intra‐particle diffusivity model. Thiourea solution was used for desorption of adsorbed metal ions from the hydrogel. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45906.

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“…Since potentials were measured with respect to the Ag/AgCl reference electrode, equivalent values versus the standard hydrogen electrode (SHE) were obtained using the equation below [14]: where E (Vs SHE) is the electrode potential relative to the SHE, E (Vs reference) is the potential measured in the experiment relative to the Ag/AgCl reference and E reference (Vs SHE) is the potential of the Ag/AgCl reference relative to the SHE. For 3 M NaCl (aq) filling solution (used in this work), E reference (Vs SHE) is 209 mV [15].…”

Section: Ni 2+ /Ni(s) Reduction Reactionmentioning

confidence: 99%

A Simplified Microcontroller Based Potentiostat for Low-Resource Applications

Aremo¹,

Adeoye²,

Obioh³

et al. 2015

OJMetal

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A low component count, microcontroller-based potentiostat circuit was developed through the use of operational amplifiers arranged in different feedback configurations. This was developed to alleviate the cost burden of equipment procurement in low-cost and budget applications. Simplicity was achieved in the design by the use of the microcontroller's native functionalities and a low-cost R/2R resistor ladder digital-to-analogue converter. The potentiostat was used to investigate the Ni 2+ /Ni(s) redox couple in a 3-electrode cell with a silver/silver chloride reference electrode and graphite counter and working electrodes. Linear sweep voltammograms were obtained at scan rates of 10, 20, 30 and 40 mV/s. The analysis of the peak current versus (scan rate) 1/2 plot indicated that the Ni 2+ /Ni(s) reduction, though conforming to the Randles-Sevcik equation, was a nonreversible redox reaction.

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Reference Electrodes in Metal Corrosion

Cited by 14 publications

References 45 publications

Oil Extraction from “Morelos Rice” Bran: Kinetics and Raw Oil Stability

Oil Extraction from “Morelos Rice” Bran: Kinetics and Raw Oil Stability

Pectin‐[(3‐acrylamidopropyl) trimethylammonium chloride‐co‐acrylic acid] hydrogel prepared by gamma radiation and selectively silver (Ag) metal adsorption

A Simplified Microcontroller Based Potentiostat for Low-Resource Applications

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