Construction of a Solid Contact Polymeric Membrane Electrode for pH Measurements in Acidic Media

Soleymanpour, Ahmad; Shafaatian, Bita; Hanifi, Abdolghafour; Jarrahpour, Aliasghar

doi:10.1149/2.028401jes

Cited by 6 publications

(3 citation statements)

References 40 publications

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“…Therefore, this Schiff base was used as a new ionophore to prepare the selective electrode for Hg 2+ ions. It was previously known that the potential of ion-selective electrodes (ISEs) is fundamentally dependent on the amount and nature of the ionophore, plasticizer, and lipophlic additives [ 52 ]. On the other hand, the plasticizer/PVC ratio plays a main role to obtain optimized response [ 53 ].…”

Section: Resultsmentioning

confidence: 99%

Design and Characterization of Electrochemical Sensor for the Determination of Mercury(II) Ion in Real Samples Based upon a New Schiff Base Derivative as an Ionophore

Alharthi

Fallatah

Al-Saidi

2021

Sensors

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The present paper provides a description of the design, characterization, and use of a Hg2+ selective electrode (Hg2+–SE) for the determination of Hg2+ at ultra-traces levels in a variety of real samples. The ionophore in the proposed electrode is a new Schiff base, namely 4-bromo-2-[(4-methoxyphenylimino)methyl]phenol (BMPMP). All factors affecting electrode response including polymeric membrane composition, concentration of internal solution, pH sample solution, and response time were optimized. The optimum response of our electrode was obtained with the following polymeric membrane composition (% w/w): PVC, 32; o-NPOE, 64.5; BMPMP, 2 and NaTPB, 1.5. The potentiometric response of Hg2+–SE towards Hg2+ ion was linear in the wide range of concentrations (9.33 × 10–8−3.98 × 10–3 molL–1), while, the limit of detection of the proposed electrode was 3.98 × 10–8 molL–1 (8.00 μg L–1). The Hg2+–SE responds quickly to Hg2+ ions as the response time of less than 10 s. On the other hand, the slope value obtained for the developed electrode was 29.74 ± 0.1 mV/decade in the pH range of 2.0−9.0 in good agreement with the Nernstian response (29.50 mV/decade). The Hg2+–SE has relatively less interference with other metal ions. The Hg2+–SE was used as an indicator electrode in potentiometric titrations to estimate Hg2+ ions in waters, compact fluorescent lamp, and dental amalgam alloy and the accuracy of the developed electrode was compared with ICP–OES measurement values. Moreover, the new Schiff base (BMPMP) was synthesized and characterized using ATR–FTIR, elemental analysis, 1H NMR, and 13C NMR. The PVC membranes containing BMPMP as an ionophore unloaded and loaded with Hg(II) are reported by scanning electron microscope images (SEM) along with energy-dispersive X-ray spectroscopy (EDX) spectra.

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Section: Resultsmentioning

confidence: 99%

Design and Characterization of Electrochemical Sensor for the Determination of Mercury(II) Ion in Real Samples Based upon a New Schiff Base Derivative as an Ionophore

Alharthi

Fallatah

Al-Saidi

2021

Sensors

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“…The membrane composition, the properties of plasticizers and additive used have impact on the sensitivity, selectivity and linearity of the potentiometric electrodes [25,26]. The plasticizers enhance the working concentration range, stability and life time of the electrode due to their nature [27,28,29].…”

Section: Optimization Of Membrane Componentsmentioning

confidence: 99%

A New Fe (III)-Selective Membrane Electrode Based on Fe (II) Phthalocyanine

Özer

Işıldak

2019

J. Electrochem. Sci. Technol

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A new miniaturized all solid-state contact Fe (III)-selective PVC membrane electrode based on Fe (II) phthalocyanine as a neutral carrier was described. The effects of the membrane composition and foreign ions on the electrode performance was investigated. The best performance was obtained with a membrane containing 32% poly (vinyl chloride), 64% dioctylsebacate, 3% Fe (II) phthalocyanine, and 1% potassium tetrakis (p-chlorophenyl) borate. The electrode showed near Nernstian response of 26.04 ± 0.95 mV/decade over the wide linear concentration range 1.0 × 10-6 to 1.0 × 10-1 M, and a very low limit of detection 1.8±0.5 × 10-7 M. The potentiometric response of the developed electrode was independent at pH 3.5-5.7. The lifetime of the electrode was approximately 3 months and the response time was very short (< 7 s). It exhibited excellent selectivity towards Fe (III) over various cations. The miniaturized all solid-state contact Fe (III)-selective membrane electrode was successfully applied as an indicator electrode for the potentiometric titration of 1.0 × 10-3 M Fe (III) ions with a 1.0 × 10-2 M EDTA and the direct determination of Fe (III) ions in real water samples.

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“…These disadvantages surely limited practical application of the electrode. In recent years, we have successfully reported the construction of sensitive and selective chemical sensors for a variety of important species 22,28–31. In this paper, the preparation, characterization and analytical application of a new potentiometric carbon paste sensor in pharmaceutical preparations and also biological matrices have been described.…”

Section: Introductionmentioning

confidence: 99%

Construction of a Novel Carbon Paste Clarithromycin Sensor for Low Level Concentration Measurement, Applications to Pharmaceutical and Biological Analysis

Soleymanpour

Nadimi

2015

Electroanalysis

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[a] 1IntroductionMacrolide antibiotics are currently gaining prominence in view of their activities in the treatment of various bacterial infections in humans and animals.G enerations of macrolide antibiotics such as clarithromycin,r oxithromycin and azithromycin are currently used due to theira cid stability and wide distribution in tissues [1][2][3].C larithromycin (CLA), Fig. 1, is an ew semisynthetic macrolide antibacterial with a1 4-membered ring whichu sed to treat pharyngitis,t onsillitis,a cute maxillary sinusitis,a cute bacterial exacerbation of chronicb ronchitis,p neumonia (especiallyatypicalp neumonias associated with Chlamydophila pneumoniae) and skin structure infections caused by susceptible organisms, especially in the penicillin-allergic patients [4].I na ddition,i tis sometimes used to treat Legionella, Mycoplasma, Chlamydia, Helicobacter pylori (causes gastritis and gastric ulcers) and Lyme disease [5,6].Am ost promising indication for clarithromycin appearst ob ei nt he treatment of immunocompromised patients infected with Mycobacterium avium complex [7]. Clarithromycin present several clinical advantages over erythromycin, including bettero verall bioavailability,e nhanced spectrum activity,h igher tissuec oncentrations and improved tolerability [ 2].Therequirements and the development of adequate analytical methods for the determination of clarithromycin and its metabolites concentration in pharmaceutical preparations and also biological samples have been led to the development of av ariety of determinationm ethods such as chromatography [8][9][10],s pectrophotometry [11,12], fluorimetry [13] and electrochemistry [14,15].H owever, mosto ft hesem ethods are eithert ime-consuming or requiree xpensive and sophisticated instruments,w ell controlled experimental conditions and somes ample pretreatments.T hus,t he introductiono fanew potentiometric sensor for easy,f ast, simple and selective determination of clarithromycin is an urgentneed.Pharmaceutical analysis with potentiometric sensors have enabled the activity of various species of pharmaceutical interest to be measured directly and selectively and, in mostinstances,without prior separation of the primarya nalyte from the formulation matrix. Moreover, poAbstract:Apotentiometric carbon paste sensor was fabricated for determination of clarithromycin based on incorporation of the ion association complexo ft he clarithromycin-phosphotungstate.T he proposed sensor exhibited aN ernstian slopeo f5 9.2 AE 0.3 mV per decade for clarithromycin over aw ide concentration range of 7.4 10 À7 to 1.5 10 À3 M, with al ow detection limit of 5.0 10 À7 M. Thep roposed sensor manifested advantages of very fast response,l ong life time and, most importantly, excellent selectivity for clarithromycin relative to aw ide variety of common foreign inorganic cation, and also biological species.T he sensor was successfully appliedt od etermine clarithromycin in clarithromycin tablet,b lood serum and urine samples.T he inclusionc omplex formation between b-cyclodextr...

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Construction of a Solid Contact Polymeric Membrane Electrode for pH Measurements in Acidic Media

Cited by 6 publications

References 40 publications

Design and Characterization of Electrochemical Sensor for the Determination of Mercury(II) Ion in Real Samples Based upon a New Schiff Base Derivative as an Ionophore

Design and Characterization of Electrochemical Sensor for the Determination of Mercury(II) Ion in Real Samples Based upon a New Schiff Base Derivative as an Ionophore

A New Fe (III)-Selective Membrane Electrode Based on Fe (II) Phthalocyanine

Construction of a Novel Carbon Paste Clarithromycin Sensor for Low Level Concentration Measurement, Applications to Pharmaceutical and Biological Analysis

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