A New N-Heterocyclic Carbene Ionophore in Plasticizer-free Polypyrrole Membrane for Determining Ag+ in Tap Water

Said, Nur Rahimah; Rezayi, Majid; Narimani, Leila; Al-Mohammed, Nassir N.; Manan, Ninie Suhana Abdul; Alias, Yatimah

doi:10.1016/j.electacta.2016.02.173

Cited by 10 publications

(7 citation statements)

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“…The sensor was successfully used as an indicating electrode during potentiometric mercury titration with EDTA. Said et al used bis[1-benzylbenzimidazoliumethyl]-4-methylbenzenesufonamide bromide as Ag + ionophore,108 but the calculated selectivity coefficients of the prepared sensor were very modest and resulted in an unattractive detection limit of 2•10 -6 M. Omran and co-workers reported on another Ag + ionophore -p-tert-butylthiacalix[4]arene with two triazole rings 109. An ISE based on this carrier exhibited a close to Nernstian response slope in the concentration range from 7.0•10 -6 M to 8.0•10 -3 M and a very modest detection limit of 3.9•10 -6 M. Unfortunately, the proposed modification of the calix[4]arene structure did not result in a significant improvement of the selectivity towards Ag + , and the worst selectivity was observed over potassium and sodium.A family of four Cu 2+ ionophores based on[14]tetraazaannulene derivatives was synthesized and characterized in ion-selective membranes by Kawakami and coworkers 110.…”

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confidence: 99%

Potentiometric Sensing

2018

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Potentiometric Sensing

2018

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“…The plan of electrochemical detection technology is to design a sensitive, selective, and specific detection technique as alternative methods for several of current diagnosis examinations. These platforms measure the output signal by cyclic voltammetry (CV), square wave voltammetry (SWV), differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS) .…”

Section: Methodsmentioning

confidence: 99%

Early detection of cervical cancer based on high‐risk HPV DNA‐based genosensors: A systematic review

et al. 2018

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Human papillomavirus type (HPV) is a common cause of sexually transmitted disease (STD) in humans. HPV types 16 and 18 as the highest risk types are related with gynecologic malignancy and cervical cancer (CC) among women worldwide. Recently, considerable development of genosensors, which allows dynamic monitoring of hybridization events for HPV‐16 and 18, has been a topic of focus by many researchers. In this systematic review, we highlight the route of development of DNA‐based genosensory detection methods for diagnosis of high risk of HPV precancer. Biosensor detection methods of HPV‐16 and 18 was investigated from 1994 to 2018 using several databases including PubMed, Cochrane Library, Scopus, Google Scholar, SID, and Scientific Information Database. Manual search of references of retrieved articles were also performed. A total of 50 studies were reviewed. By analyzing the most recent developed electrochemical biosensors for the identification of HPV, we observed that the sensor platform fabricated by Wang et al. holds the lowest detection limit reported in the literature for the DNA of HPV‐16. Up to this date, optical, electrochemical, and piezoelectric systems are the main transducers used in the development of biosensors. Among the most sensitive techniques available to study the biorecognition activity of the sensors, we highlight the biosensors based fluorescent, EIS, and QCM. The current systematic review focuses on the sensory diagnostic methods that are being used to detect HPV‐16 and 18 worldwide. Special emphasis is given on the sensory techniques that can diagnosis the individuals with CC. © 2018 BioFactors, 45(2):101–117, 2019

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“…(5) Ion-selective electrodes (ISEs) have emerged as a type of tool to minimize the cut breaks of the prior detection methods and have been proven to have fast response and high selectivity as well as sensitivity over a wide dynamic range. (6) Anion-selective membrane electrodes using ionophores as the active material were proven to deviate from the classic Hofmeister selectivity sequence, i.e., ClO − > SCN − > I − > NO − > Br − > NO − > Cl − . Several ionophores have been found to alter the Hofmeister order and metalloporphyrins are one of them.…”

Section: Introductionmentioning

confidence: 99%

“…The utilization of a plasticizer in the fabrication of sensors comes with many impediments, i.e., it leads to the exudation and leaching of plasticizers from the membrane to the environment and reduces the sensor lifetime. (6) The leaching of plasticizers weakens the adhesion of the polymeric membrane onto the glassy carbon electrode (GCE). Also, the reported toxicity of the commercially used plasticizers to the environment will have many drawbacks in the future, especially the pollution of the environment by these highly toxic chemicals.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the utilization of acrylate polymers excludes the use of plasticizers and hence eliminates the drawbacks of plasticizers and increases the performance of ISEs. (6) A silver (Ag) layer was introduced as the foundation layer between GCE and the polymeric membrane to increase the synergistic effect between the GCE and the active compounds of the sensor on the detection of the analyte. Consequently, the performance of the self-polymerized thiocyanate sensor was enhanced.…”

Section: Introductionmentioning

confidence: 99%

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Self-plasticizing Membrane Based on Co(II)-porphyrin Modified with Silver Nanoparticles for Thiocyanate Detection

Zainal¹,

Rezayi²,

Alias³

et al. 2019

Sensors and Materials

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A novel potentiometric anion-selective self-plasticizing polymeric membrane based on 5,10,15,20-tetrakis-(4-methoxyphenyl)-21H,23H-porphyrin cobalt(II) (CoTMeOPP)-silvernanoparticle-modified glassy carbon electrode (GCE) was examined for use in the detection of thiocyanate anions. The membrane was characterized by X-ray diffraction (XRD) analysis, field-emission electron microscopy, UV-visible diffused ref lectance spectroscopy, and fluorescence spectroscopy. The prepared ion-selective sensor exhibited a positive Nernstian response and deviated from the classical Hofmeister selective pattern with a significantly sensitive and enhanced response towards the thiocyanate anion. It exhibited a rapid response of 3 s with a low detection limit of 9.55 × 10 −8 M within the concentration range from 1 × 10 −1 to 1 × 10 −7 M. The sensor also showed a high selectivity for the thiocyanate anion over a variety of anions. The influence of the additives was studied and this sensor was successfully applied to the potentiometric titration of silver nitrate and the direct determination of the amount of thiocyanate anions in a wide array of samples of river water, ex-mine lake sediment, human saliva, and fish.

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A New N-Heterocyclic Carbene Ionophore in Plasticizer-free Polypyrrole Membrane for Determining Ag+ in Tap Water

Cited by 10 publications

References 58 publications

Potentiometric Sensing

Potentiometric Sensing

Early detection of cervical cancer based on high‐risk HPV DNA‐based genosensors: A systematic review

Self-plasticizing Membrane Based on Co(II)-porphyrin Modified with Silver Nanoparticles for Thiocyanate Detection

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