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Journal articles on the topic 'Electroanalytical method'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 June 2025

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1

Naik, Keerti M., and Sharanappa T. Nandibewoor. "Electroanalytical method for the determination of methylparaben." Sensors and Actuators A: Physical 212 (June 2014): 127–32. http://dx.doi.org/10.1016/j.sna.2014.03.033.

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2

Stojanović, Zorica, Ana Đurović, Snežana Kravić, et al. "A simple and rapid electrochemical sensing method for metribuzin determination in tap and river water samples." Analytical Methods 8, no. 12 (2016): 2698–705. http://dx.doi.org/10.1039/c5ay03243a.

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3

Nissim, Rita, and Richard G. Compton. "Introducing absorptive stripping voltammetry: wide concentration range voltammetric phenol detection." Analyst 139, no. 22 (2014): 5911–18. http://dx.doi.org/10.1039/c4an01417k.

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4

Ustinova, Elvira M., Eduard Gorchakov, and Alina V. Melkova. "Monitoring the Palladium Contents in the Tailings Using Stripping Voltammetry." Key Engineering Materials 712 (September 2016): 328–31. http://dx.doi.org/10.4028/www.scientific.net/kem.712.328.

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Anodic stripping voltammetry, a classical electroanalytical method has been optimized to analyze trace Pd (II) in tailings. The authors identified the registration conditions in the determination of the analytical signal Pd (II): the composition of background electrolyte and the electrolysis potential. The electroanalytical approaches with an unmodified carbon electrode were used. The use of stripping voltammetry applied to the assessment of the palladium content in geological objects was demonstrated.

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5

Eisele, Ana Paula Pires, Camila Farinha Valezi, and Elen Romão Sartori. "Exploiting the high oxidation potential of carisoprodol on a boron-doped diamond electrode: an improved method for its simultaneous determination with acetaminophen and caffeine." Analyst 142, no. 18 (2017): 3514–21. http://dx.doi.org/10.1039/c7an01074e.

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6

Xiang, Ma. "Application of an electroanalytical method to metal phase analysis." Journal of Electroanalytical Chemistry and Interfacial Electrochemistry 242, no. 1-2 (1988): 63–76. http://dx.doi.org/10.1016/0022-0728(88)80239-0.

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7

Silva, Tiago Almeida, and Orlando Fatibello-Filho. "Square-wave adsorptive anodic stripping voltammetric determination of ramipril using an electrochemical sensor based on nanostructured carbon black." Analytical Methods 9, no. 32 (2017): 4680–87. http://dx.doi.org/10.1039/c7ay01479a.

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8

Liu, Yun, Jing-Hao Pan, Ying-Li Wei, and Yong Zhang. "Electroanalytical method of TCPP and its supramolecular system with cyclodextrins." Talanta 63, no. 3 (2004): 581–84. http://dx.doi.org/10.1016/j.talanta.2003.11.028.

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9

Xiao-Quan, Lu, Wang Xi-Wen, Kang Jing-Wan, Gao Jin-Zhang, and Mo Jin-Yuan. "Electroanalytical signal processing method based on B-spline wavelets analysis." Analyst 124, no. 5 (1999): 739–44. http://dx.doi.org/10.1039/a805922e.

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10

Wu, Shilin, Yamei Jin, Na Yang, Xueming Xu, and Zhengjun Xie. "Determination of fat content in UHT milk by electroanalytical method." Food Chemistry 270 (January 2019): 538–45. http://dx.doi.org/10.1016/j.foodchem.2018.07.119.

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11

Wang, Lu, Qinqin Wang, Kai Sheng, Lina Zou та Baoxian Ye. "The first voltammetric investigation for astilbin based on β-cyclodextrin functionalized graphene modified electrode". Analytical Methods 8, № 24 (2016): 4888–94. http://dx.doi.org/10.1039/c6ay01014h.

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The electrochemical properties of astilbin were investigated for the first time and an electroanalytical method was established synchronously, which was based on a β-cyclodextrin–graphene nanocomposite modified electrode.

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12

Vishnu, Nandimalla, Mansi Gandhi, Desikan Rajagopal, and Annamalai Senthil Kumar. "Pencil graphite as an elegant electrochemical sensor for separation-free and simultaneous sensing of hypoxanthine, xanthine and uric acid in fish samples." Analytical Methods 9, no. 15 (2017): 2265–74. http://dx.doi.org/10.1039/c7ay00445a.

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13

Aller Pellitero, Miguel, Maria Kitsara, Friedrich Eibensteiner, and F. Javier del Campo. "Rapid prototyping of electrochemical lateral flow devices: stencilled electrodes." Analyst 141, no. 8 (2016): 2515–22. http://dx.doi.org/10.1039/c5an02424b.

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A straightforward and very cost effective method is proposed to prototype electrodes using pressure sensitive adhesives and a simple cutting technique. The prototyping approach presented here is highly suitable for the development of novel electroanalytical tools.

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14

NIGOVIC, Biljana, and Ivona MILANOVIC. "Green Electroanalytical Method for Fast Measurement of Xanthine Oxidase Inhibitor Febuxostat." Analytical Sciences 33, no. 11 (2017): 1219–23. http://dx.doi.org/10.2116/analsci.33.1219.

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15

Sun, Tianlin, L. Bai, and B. E. Conway. "New electroanalytical method for determination of chloride ion at low concentrations." Electroanalysis 5, no. 5-6 (1993): 467–71. http://dx.doi.org/10.1002/elan.1140050515.

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16

Alghamdi, Ahmad H. "A Square-Wave Adsorptive Stripping Voltammetric Method for the Determination of Amaranth, a Food Additive Dye." Journal of AOAC INTERNATIONAL 88, no. 3 (2005): 788–93. http://dx.doi.org/10.1093/jaoac/88.3.788.

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Abstract Square-wave adsorptive stripping voltammetric (AdSV) determinations of trace concentrations of the azo coloring agent Amaranth are described. The analytical methodology used was based on the adsorptive preconcentration of the dye on the hanging mercury drop electrode, followed by initiation of a negative sweep. In a pH 10 carbonate supporting electrolyte, Amaranth gave a well-defined and sensitive AdSV peak at −518 mV. The electroanalytical determination of this azo dye was found to be optimal in carbonate buffer (pH 10) under the following experimental conditions: accumulation time, 120 s; accumulation potential, 0.0 V; scan rate, 600 mV/s; pulse amplitude, 90 mV; and frequency, 50 Hz. Under these optimized conditions the AdSV peak current was proportional over the concentration range 1 × 10−8 − 1.1 × 10−7 mol/L (r = 0.999) with a detection limit of 1.7 × 10−9 mol/L (1.03 ppb). This analytical approach possessed enhanced sensitivity, compared with conventional liquid chromatography or spectrophotometry and it was simple and fast. The precision of the method, expressed as the relative standard deviation, was 0.23%, whereas the accuracy, expressed as the mean recovery, was 104%. Possible interferences by several substances usually present as food additive azo dyes (E110, E102), gelatin, natural and artificial sweeteners, preservatives, and antioxidants were also investigated. The developed electroanalyticals method was applied to the determination of Amaranth in soft drink samples, and the results were compared with those obtained by a reference spectrophotometric method. Statistical analysis (paired t-test) of these data showed that the results of the 2 methods compared favorably.

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17

Wang, Wenjing, Jian Gao, Lu Wang, and Baoxian Ye. "Electrochemical behavior of naringenin and its sensitive determination based on a single-walled carbon nanotube modified electrode." Analytical Methods 7, no. 20 (2015): 8847–56. http://dx.doi.org/10.1039/c5ay01782c.

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A stable voltammetric sensor, single-walled carbon nanotubes modified electrode (SWCNT/GCE), was employed for studying the electrochemical characteristics of naringenin. The reaction mechanism of naringenin at SWCNTs/GCE was also proposed. A simple, reliable and sensitive electroanalytical method for naringenin was established using LSV.

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18

Škugor Rončević, Ivana, Marijo Buzuk, Maša Buljac, and Nives Vladislavić. "The Preparation, Morphological Characterization and Possible Electroanalytical Application of a Hydroxyapatite-Modified Glassy Carbon Electrode." Crystals 11, no. 7 (2021): 772. http://dx.doi.org/10.3390/cryst11070772.

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By simple modification of a GC electrode with biofunctional material, hydroxyapatite (HAp), an efficient electroanalytical tool, was designed and constructed. Modification of the GC surface includes two steps in synthesis: electrochemical deposition and chemical conversion. The properties, structure, and morphology of a nanosized material formed on a surface and absorbability were studied by electrochemical impedance spectroscopy, Fourier-transform infrared spectroscopy and scanning electron microscopy with energy-dispersive spectroscopy analysis. Numerous methods in this work confirmed that the developed method for controlled HAp deposition results in a HAp open structure and uniform morphology, which is capable of the selective absorption of the target species. The main goal of this study was the possibility of using a HAp-modified electrode for the fast screening of copper, cadmium, and lead content in honey and sugar samples. The electrochemical behavior and potential of the electroanalytical determination of heavy metals using the HAp/GC electrode were studied using cyclic voltammetry and square wave anodic stripping voltammetry. The HAp/GC electrode exhibited great performance in the determination of heavy metals, based on the reduction of target metals, because of the high absorbability of the HAp film and the electroanalytical properties of GC. A linear response between 10 and 1000 μg/L for Cu and Pb and 1 and 100 μg/L for Cd, with an estimated detection limit of 2.0, 10.0, and 0.9 μg/L, respectively, was obtained.

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19

Guo, Yu-Jing, Jing-Hao Pan, Xiao-Mei Li, Fei Lu, and You-Qin Li. "Electroanalytical Method of Acid Blue 120 and its Supramolecular System with Cyclodextrins." Journal of Inclusion Phenomena and Macrocyclic Chemistry 56, no. 1-2 (2006): 243–46. http://dx.doi.org/10.1007/s10847-006-9090-5.

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20

De Souza, Djenaine, and Sergio A. S. Machado. "Electroanalytical method for determination of the pesticide dichlorvos using gold-disk microelectrodes." Analytical and Bioanalytical Chemistry 382, no. 7 (2005): 1720–25. http://dx.doi.org/10.1007/s00216-005-3324-z.

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21

Guo, Yu-Jing, Jing-Hao Pan, Xiao-Men Li, and Fei Lu. "Electroanalytical method of Acid red 1 and its supramolecular system with cyclodextrins." Dyes and Pigments 70, no. 1 (2006): 27–30. http://dx.doi.org/10.1016/j.dyepig.2005.03.005.

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22

Karadurmus, Leyla, I. Firat Sahin, Sevinc Kurbanoglu, and Sibel A. Ozkan. "Electrochemical Determination of Non-Steroidal Anti-Inflammatory Drugs." Current Analytical Chemistry 15, no. 4 (2019): 485–501. http://dx.doi.org/10.2174/1573411014666180917113920.

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Electrochemical methods have been used for the determination of nonsteroidal antiinflammatory drugs (NSAID) just as used in the determination of various drugs. Among voltammetric methods; differential pulse voltammetric method, square wave voltammetric method and linear sweep voltammetric method are the most commonly used ones. NSAIDs are widely used in the treatment of inflammatory conditions such as musculoskeletal disorders (rheumatoid arthritis, osteoarthritis, acute gouty arthritis) and dental pain, menstrual pain, postoperative pain and migraine. In this review, some selected recent electrochemical studies were selected related to the nonsteroidal antiinflammatory drug analyzes. The aim of this review is to evaluate and discuss the advantages, details and usages of electroanalytical methods in the determination of nonsteroidal anti-inflammatory drug.

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23

Nigović, Biljana, Ana Mornar, and Mario Završki. "Rapid Electroanalytical Method for Determination of Nebivolol at a Boron-Doped Diamond Electrode." Journal of AOAC INTERNATIONAL 98, no. 6 (2015): 1535–41. http://dx.doi.org/10.5740/jaoacint.15015.

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Abstract A boron-doped diamond electrode provided a sensitive and cost-effective sensing platform for detection and quantitative determination of novel beta(1)-adrenergic receptor antagonist nebivolol. The net square-wave voltammetric response at 1.31 V related to the oxidation of nebivolol was obtained in Britton-Robinson buffer solution at pH 8. It increased linearly with the drug concentration in the range of 2.5 × 10–7 to 1.5 × 10–5 M. The LOD attained was 3.2 × 10–8 M. The practical analytical approach was illustrated by high speed quantification of nebivolol in a commercial pharmaceutical formulation. The RP-HPLC was selected as a comparative method for evaluating the proposed electroanalytical method. The newly developed method at the unmodified electrode surface was faster and simpler in comparison with HPLC (the retention time was 17.6 min), and only 6 s was necessary for direct voltammetric measurement in the potential range from 0.5 to 1.7 V with a 2 mV potential step and pulse frequency of 100 Hz.

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24

Oliveira, Raquel, Fátima Bento, Catherine Sella, Laurent Thouin, and Christian Amatore. "Direct Electroanalytical Method for Alternative Assessment of Global Antioxidant Capacity Using Microchannel Electrodes." Analytical Chemistry 85, no. 19 (2013): 9057–63. http://dx.doi.org/10.1021/ac401566w.

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25

Araujo, Alessandra Silveira Antunes, Ricardo Pini Caramit, Lincoln Carlos Silva Oliveira, and Valdir Souza Ferreira. "Electroanalytical Method for Determining Pyrogallol in Biodiesel in the Presence of a Surfactant." Electroanalysis 27, no. 5 (2015): 1152–58. http://dx.doi.org/10.1002/elan.201400647.

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26

Jennane, Jamila, Tanya Boutros, and Richard Giasson. "Photolithography of self-assembled monolayers: optimization of protecting groups by an electroanalytical method." Canadian Journal of Chemistry 74, no. 12 (1996): 2509–17. http://dx.doi.org/10.1139/v96-281.

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Patterned surfaces presenting a high density of chemically reactive functional groups can be prepared through photolithography of self-assembled monolayers (SAM). In this paper, we report the synthesis and the evaluation of three reagents that can be used in SAM-photolithographic applications. These reagents are made up of a triethoxysilylpropylamine moiety in which the amine is temporarily blocked by photolabile protecting groups: NVOC (o-nitroveratryloxycarbonyl), ONB (o-nitrobenzyl), or DDZ (α,α-dimethyl-3,5-dimethoxybenzyloxycarbonyl). The presence of the triethoxysilyl group allows self-assembled monolayer formation. Release of chemically reactive amino groups is achieved by irradiation of the surface. An electroanalytical method was developed and used to monitor and optimize the three steps of the methodology occurring on surfaces: monolayer formation, photodeprotection, and subsequent functionalization of the released amino groups. Quantitative information on the efficiency of the photodeprotection step was obtained by this method. It was found that the DDZ group is superior to the ONB and NVOC photolabile protecting groups for SAM-photolithographic applications. Percentages of liberated amino groups are generally above 50% with the DDZ group, while they are generally inferior to 25% and 2% for NVOC and ONB, respectively. These differences are attributed to the destruction of some of the released amino groups through a subsequent reaction with the photoproduct, o-nitrosobenzaldehyde for ONB and 3,4-dimethoxy-6-nitrosobenzaldehyde for NVOC, and to partial loss or destruction of the monolayer during prolonged irradiations. Key words: self-assembled monolayers, surface modification, photolithography, photolabile protecting groups, cyclic voltammetry.

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27

Silva, Adenilton Camilo, José Eduardo Matos Paz, Liliana F. B. Lira Pontes, Sherlan Guimarães Lemos, and Márcio José Coelho Pontes. "An electroanalytical method to detect adulteration of ethanol fuel by using multivariate analysis." Electrochimica Acta 111 (November 2013): 160–64. http://dx.doi.org/10.1016/j.electacta.2013.07.208.

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28

Waris, Muhammad, Jameel Ahmed Baig, Sirajuddin, et al. "Selective Electroanalytical Method for the Determination of Roxarsone in Poultry Feed and Litter." Food Analytical Methods 9, no. 8 (2016): 2142–51. http://dx.doi.org/10.1007/s12161-015-0385-2.

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29

Zanotto, F. M., R. A. Fernández, and S. A. Dassie. "An electroanalytical method for monitoring acid hydrolysis reactions using thick-film modified electrodes." Electrochimica Acta 380 (June 2021): 137906. http://dx.doi.org/10.1016/j.electacta.2021.137906.

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30

Djurovic, Ana, Zorica Stojanovic, Snezana Kravic, Tijana Zeremski, Nada Grahovac, and Tanja Brezo-Borjan. "Determination of metribuzin content in pesticide formulations using electroanalytical methodology." Acta Periodica Technologica, no. 49 (2018): 43–51. http://dx.doi.org/10.2298/apt1849043d.

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The work presents results of the determination of metribuzin content in commercial pesticide formulations by applying chronopotentiometry with thin film mercury electrode as an electrochemical sensor. In the analyzed pesticide formulations, a single well defined reduction peak of metribuzin is observed at the potential around -880 mV. The content of the herbicide in commercial formulations is determined using the calibration curve method, by applying the initial potential of -0.21 V, and the final potential of -1.10 V. Recovery values based on the declared and found content of the active ingredient are in the range from 100.67% to 101.68%, with the values of relative standard deviation lower than 1.00%, indicating high accuracy and precision of the presented method.

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31

Pinheiro, Jose Paulo, Luciana S. Rocha, Danielle Goveia, and Raewyn M. Town. "Scanned stripping chronopotentiometry at bismuth film rotating disc electrodes: a method for quantitative dynamic metal speciation." Environmental Chemistry 11, no. 2 (2014): 150. http://dx.doi.org/10.1071/en13147.

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Environmental context Electroanalytical methods have found wide application in trace metal speciation analysis in environmental systems. The need to find functional alternatives to mercury electrodes for in situ speciation studies has encouraged the use of bismuth as a solid-state electrode substrate. We demonstrate the utility of bismuth electrodes for quantitative dynamic speciation analysis. Abstract Bismuth film electrodes are employed for dynamic metal speciation analysis of PbII complexes by stripping chronopotentiometry at scanned deposition potential (SSCP). Their performance is found to be comparable to that of mercury-film electrodes. The quantitative SSCP expressions that describe the thermodynamic and kinetic complexation parameters are straightforwardly applicable to this solid electrode.

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32

Vasconcellos, Maria de Lourdes S., Luiz Ricardo G. Silva, Chung-Seop Lee, Ana Sofia Fajardo, Sergi Garcia-Segura, and Josimar Ribeiro. "Dimensionally Stable Anode Based Sensor for Urea Determination via Linear Sweep Voltammetry." Sensors 21, no. 10 (2021): 3450. http://dx.doi.org/10.3390/s21103450.

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Urea is an added value chemical with wide applications in the industry and agriculture. The release of urea waste to the environment affects ecosystem health despite its low toxicity. Online monitoring of urea for industrial applications and environmental health is an unaddressed challenge. Electroanalytical techniques can be a smart integrated solution for online monitoring if sensors can overcome the major barrier associated with long-term stability. Mixed metal oxides have shown excellent stability in environmental conditions with long lasting operational lives. However, these materials have been barely explored for sensing applications. This work presents a proof of concept that demonstrates the applicability of an indirect electroanalytical quantification method of urea. The use of Ti/RuO2-TiO2-SnO2 dimensional stable anode (DSA®) can provide accurate and sensitive quantification of urea in aqueous samples exploiting the excellent catalytic properties of DSA® on the electrogeneration of active chlorine species. The cathodic reduction of accumulated HClO/ClO− from anodic electrogeneration presented a direct relationship with urea concentration. This novel method can allow urea quantification with a competitive LOD of 1.83 × 10−6 mol L−1 within a linear range of 6.66 × 10−6 to 3.33 × 10−4 mol L−1 of urea concentration.

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33

de Araujo, William R., Adriano O. Maldaner, José L. Costa, and Thiago R. L. C. Paixão. "Development of an electroanalytical method for the quantification of aminopyrine in seized cocaine samples." Microchemical Journal 121 (July 2015): 213–18. http://dx.doi.org/10.1016/j.microc.2015.03.012.

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34

Filanovsky, Boris, Yakov I. Tur'yan, Ilya Kuselman, Tat'yana Burenko, and Avinoam Shenhar. "Solid electrodes from refractory powder materials prepared for electroanalytical purposes by a novel method." Analytica Chimica Acta 364, no. 1-3 (1998): 181–88. http://dx.doi.org/10.1016/s0003-2670(98)00156-1.

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35

Ramírez, Eduardo Alejandro, Patricia Gabriela Molina, María Alicia Zón, and Héctor Fernández. "Development of an Electroanalytical Method for the Quantification of Zearalenone (ZEA) in Maize Samples." Electroanalysis 17, no. 18 (2005): 1635–40. http://dx.doi.org/10.1002/elan.200403193.

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36

NIKOLELIS, D., and U. KRULL. "Reliable and facile method for preparation of solventless bilayer lipid membranes for electroanalytical investigations." Talanta 39, no. 8 (1992): 1045–49. http://dx.doi.org/10.1016/0039-9140(92)80293-m.

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37

Trindade, M. A. G., P. A. C. Cunha, T. A. de Araújo, G. M. da Silva, and V. S. Ferreira. "Interaction study of moxifloxacin with Cu(II) ion using square-wave voltammetry and its application in the determination in tablets." Eclética Química 31, no. 1 (2006): 31–38. http://dx.doi.org/10.1590/s0100-46702006000100004.

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This work presents an electroanalytical method for the determination of moxifloxacin (MOXI) in tablets by its interaction with Cu(II) ion and subsequent electrochemical reduction at hanging mercury drop electrode (HMDE). A well-defined reduction peak at -0.21 V vs. Ag/AgCl in Phosphate buffer 0.04 mol L-1 pH 8.0 was observed for the complex reduction MOXI-Cu(II), using square-wave voltammetry (SWV). Using a 10 s of accumulation time at -0.40 V was found a limit detection of 3.60x10-8 mol l-1. The obtained results have shown good agreement with those obtained by spectrophotometric method.

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38

Inam, Onur, Ersin Demir, and Bengi Uslu. "Voltammetric Pathways for the Analysis of Ophthalmic Drugs." Current Pharmaceutical Analysis 16, no. 4 (2020): 367–91. http://dx.doi.org/10.2174/1573412915666190225163637.

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Background: This review investigates the ophthalmic drugs that have been studied with voltammetry in the web of science database in the last 10 years. Introduction: Ophthalmic drugs are used in the diagnosis, evaluation and treatment of various ophthalmological diseases and conditions. A significant literature has emerged in recent years that investigates determination of these active compounds via electroanalytical methods, particularly voltammetry. Low cost, rapid determination, high availability, efficient sensitivity and simple application make voltammetry one of the most used methods for determining various kinds of drugs including ophthalmic ones. Methods: In this particular review, we searched the literature via the web of science database for ophthalmic drugs which are investigated with voltammetric techniques using the keywords of voltammetry, electrochemistry, determination and electroanalytical methods. Results: We found 33 types of pharmaceuticals in nearly 140 articles. We grouped them clinically into seven major groups as antibiotics, antivirals, non-steroidal anti-inflammatory drugs, anti-glaucomatous drugs, steroidal drugs, local anesthetics and miscellaneous. Voltammetric techniques, electrodes, optimum pHs, peak potentials, limit of detection values, limit of quantification values, linearity ranges, sample type and interference effects were compared. Conclusion: Ophthalmic drugs are widely used in the clinic and it is important to determine trace amounts of these species analytically. Voltammetry is a preferred method for its ease of use, high sensitivity, low cost, and high availability for the determination of ophthalmic drugs as well as many other medical drugs. The low limits of detection values indicate that voltammetry is quite sufficient for determining ophthalmic drugs in many media such as human serum, urine and ophthalmic eye drops.

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39

Gumustas, Mehmet, and Sibel A. Ozkan. "The Role of and the Place of Method Validation in Drug Analysis Using Electroanalytical Techniques." Open Analytical Chemistry Journal 5, no. 1 (2014): 1–21. http://dx.doi.org/10.2174/1874065001005010001.

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40

Mehmet, Gumustas. "The Role of and the Place of Method Validation in Drug Analysis Using Electroanalytical Techniques." Open Analytical Chemistry Journal 5, no. 1 (2011): 1–21. http://dx.doi.org/10.2174/187406500115010001.

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41

Wang, Lu, Qiong Liu, and Baoxian Ye. "An electroanalytical method for glabridin investigation based on poly(diallyldimethylammonium chloride)-functionalized graphene-modified electrode." Microchemical Journal 158 (November 2020): 105279. http://dx.doi.org/10.1016/j.microc.2020.105279.

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42

de Araújo, William R., Maiara O. Salles, and Thiago R. L. C. Paixão. "Development of an enzymeless electroanalytical method for the indirect detection of creatinine in urine samples." Sensors and Actuators B: Chemical 173 (October 2012): 847–51. http://dx.doi.org/10.1016/j.snb.2012.07.114.

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43

Jaiswal, Juhi, and Marshal Dhayal. "Electroanalytical Method for Quantification of Hepatocellular Carcinoma Cells as Charge Transport Barriers in Culture Media." Electroanalysis 32, no. 5 (2020): 890–97. http://dx.doi.org/10.1002/elan.201900553.

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44

Milikić, Jadranka, Ivan Stoševski, Jelena Krstić, Zorica Kačarević-Popović, Šćepan Miljanić, and Biljana Šljukić. "Electroanalytical Sensing of Bromides Using Radiolytically Synthesized Silver Nanoparticle Electrocatalysts." Journal of Analytical Methods in Chemistry 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/2028417.

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Monitoring bromides (Br−) is of crucial importance since bromates, potential human carcinogens, are formed during ozonation of water containing bromides in concentrations >100 μg L−1. Within this study, silver (Ag) and four carbon-supported Ag catalysts were synthesized by the γ-radiation method and their morphology and structure examined using transmission electron microscopy, X–ray diffraction, and UV-Vis analysis. The nanocatalysts were tested for Br− sensing in aqueous media using cyclic voltammetry. All five Ag materials exhibited electroactivity for sensing of Br− ions, with pure Ag catalyst giving the best response to Br− ions presence in terms of the lowest limit of detection. Sensing of bromides was also explored in tap water after addition of bromides suggesting that herein prepared catalysts could be used for bromides detection in real samples. Furthermore, sensing of other halogen ions, namely, chlorides and iodides, was examined, and response due to chloride presence was recorded.

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M. Ribeiro, Maria Fernanda, Erica N. Oiye, Juliana M. T. Katayama, José W. C. Junior, Edward R. Dockal, and Marcelo Firmino de Oliveira. "Voltammetric Determination of LSD with a Schiff Base – Chemically Modified Electrode in Aqueous Solution." Brazilian Journal of Forensic Sciences, Medical Law and Bioethics 9, no. 4 (2020): 440–58. http://dx.doi.org/10.17063/bjfs9(4)y2020440-458.

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In recent years, practical, inexpensive, and highly specific electroanalytical methods based on modified electrodes have been increasingly developed for forensic science. Simple modification of the carbon paste electrode with Schiff base complexes has become a promising strategy to detect and quantify narcotics. In this context, we aimed to develop voltammetric methods to quantify lysergic acid diethylamide (LSD) by using a carbon paste electrode modified with the complex [UO2(Ac-ophen)]·H2O. The use of an aqueous solution of KCl as supporting electrolyte makes the methodology less polluting, which contrasts with methods that still employ toxic solvents. The developed method for Differential Pulse Voltammetry provides a linear response at various concentrations of LSD and affords analytical curves with standard deviation, detection, and quantification limits around 2.45, 0.625, and 2.08 μmol L-1, respectively. The recovery values of 103 and 108% prove that the developed method is suitable for application in forensic science.

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Pachla, Lawrence A., Donald L. Reynolds, D. Scott Wright, and Peter T. Kissinger. "Analytical Methods for Measuring Uric Acid in Biological Samples and Food Products." Journal of AOAC INTERNATIONAL 70, no. 1 (1987): 01–14. http://dx.doi.org/10.1093/jaoac/70.1.1.

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Abstract Daring the last 7 decades, uric acid methodology has kept pace with the introduction of state-of-the-art technology (e.g., spectroscopy, electrochemistry, chromatography) or the discovery of unique chemical processes (e.g., redox, enzymatic). We envision this practice will continue in the future. There never will be a single analytical method applicable for biofluids or foodstuffs. Therefore, it is imperative that the analyst not only understand the advantages and disadvantages of a procedure, but also thoroughly understand its underlying chemical and technological principles. Since many procedures available for analysis of biofluids and foodstuffs rely on identical chemical or technological principles, this report shall review both sample types and the available spectroscopic, electroanalytical, and chromatographic methods

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Leandro, Katia Christina, Juliana Machado de Carvalho, Luiz Fernando Giovanelli, and Josino Costa Moreira. "Development and validation of an electroanalytical methodology for determination of isoniazid and rifampicin content in pharmaceutical formulations." Brazilian Journal of Pharmaceutical Sciences 45, no. 2 (2009): 331–37. http://dx.doi.org/10.1590/s1984-82502009000200019.

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Tuberculosis remains a major public health problem, especially in developing countries. Brazil presents the largest number of cases in Latin America and is among the 22 countries considered priorities by the World Health Organization (WHO). The Rio de Janeiro state has the largest number of cases registered in the country. The treatment of patients, commonly, makes use of the drugs isoniazid and rifampicin for six months. This study aimed to develop and validate an electroanalytical methodology, using the technique of differential pulse voltammetry for the determination of these drugs in the associated form, in order to evaluate the quality of medicines distributed in the state of Rio de Janeiro. The potential reduction for the isoniazid and rifampicin were -1.10 and -0.90 V. The developed and validated electroanalytical method presented a linear range of 0.25 to 1.25 mg/L to isoniazid, limits of detection and quantification of 0.05 and 0.14 mg/L, and recovery of 98.2 ± 0.4%; a tracking linear of 0.40 to 2.00 mg/L for rifampicin, with limits of detection and quantification of 0.07 and 0.19 mg/L and recovery of 95.8 ± 0.6%. Six lots of medicines from two pharmaceutical companies were analyzed. Only one of the samples showed unsatisfactory levels of rifampicin.

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Bwambok, David K., Noureen Siraj, Samantha Macchi, et al. "QCM Sensor Arrays, Electroanalytical Techniques and NIR Spectroscopy Coupled to Multivariate Analysis for Quality Assessment of Food Products, Raw Materials, Ingredients and Foodborne Pathogen Detection: Challenges and Breakthroughs." Sensors 20, no. 23 (2020): 6982. http://dx.doi.org/10.3390/s20236982.

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Quality checks, assessments, and the assurance of food products, raw materials, and food ingredients is critically important to ensure the safeguard of foods of high quality for safety and public health. Nevertheless, quality checks, assessments, and the assurance of food products along distribution and supply chains is impacted by various challenges. For instance, the development of portable, sensitive, low-cost, and robust instrumentation that is capable of real-time, accurate, and sensitive analysis, quality checks, assessments, and the assurance of food products in the field and/or in the production line in a food manufacturing industry is a major technological and analytical challenge. Other significant challenges include analytical method development, method validation strategies, and the non-availability of reference materials and/or standards for emerging food contaminants. The simplicity, portability, non-invasive, non-destructive properties, and low-cost of NIR spectrometers, make them appealing and desirable instruments of choice for rapid quality checks, assessments and assurances of food products, raw materials, and ingredients. This review article surveys literature and examines current challenges and breakthroughs in quality checks and the assessment of a variety of food products, raw materials, and ingredients. Specifically, recent technological innovations and notable advances in quartz crystal microbalances (QCM), electroanalytical techniques, and near infrared (NIR) spectroscopic instrument development in the quality assessment of selected food products, and the analysis of food raw materials and ingredients for foodborne pathogen detection between January 2019 and July 2020 are highlighted. In addition, chemometric approaches and multivariate analyses of spectral data for NIR instrumental calibration and sample analyses for quality assessments and assurances of selected food products and electrochemical methods for foodborne pathogen detection are discussed. Moreover, this review provides insight into the future trajectory of innovative technological developments in QCM, electroanalytical techniques, NIR spectroscopy, and multivariate analyses relating to general applications for the quality assessment of food products.

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Hasanzadeh, Mohammad, Nasrin Shadjou, and Eskandar Omidinia. "A novel electroanalytical method for simultaneous detection of two neurotransmitter dopamine and serotonin in human serum." Journal of Neuroscience Methods 219, no. 1 (2013): 52–60. http://dx.doi.org/10.1016/j.jneumeth.2013.07.007.

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Miao, Yuqing, and Jiwei Liu. "Assembly and electroanalytical performance of Prussian blue/polypyrrole composite nanoparticles synthesized by the reverse micelle method." Science and Technology of Advanced Materials 10, no. 2 (2009): 025001. http://dx.doi.org/10.1088/1468-6996/10/2/025001.

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