Sol−Gel Derived Potentiometric pH Sensors

Marxer, Stephanie M.

doi:10.1021/ac0486995

Cited by 23 publications

(13 citation statements)

References 42 publications

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“…In contrast, sub-Nernstian behavior (−42.23 mV/decade) was observed for sensors prepared with PEDOT-PEG membranes. The decrease in the response slope in hydrophilic and charge density surfaces, as in the case of this PEG-modified surface, has been reported on alkylsilane-modified potentiometric pH sensors [18,19]. As reported charged and conductive polymers have more difficulties to achieve a great selectivity in ISE membrane.…”

Section: Resultssupporting

confidence: 58%

Miniaturizable Ion-Selective Arrays Based on Highly Stable Polymer Membranes for Biomedical Applications

Mir

Lugo

Tahirbegi

et al. 2014

Sensors

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Poly(vinylchloride) (PVC) is the most common polymer matrix used in the fabrication of ion-selective electrodes (ISEs). However, the surfaces of PVC-based sensors have been reported to show membrane instability. In an attempt to overcome this limitation, here we developed two alternative methods for the preparation of highly stable and robust ion-selective sensors. These platforms are based on the selective electropolymerization of poly(3,4-ethylenedioxythiophene) (PEDOT), where the sulfur atoms contained in the polymer covalently interact with the gold electrode, also permitting controlled selective attachment on a miniaturized electrode in an array format. This platform sensor was improved with the crosslinking of the membrane compounds with poly(ethyleneglycol) diglycidyl ether (PEG), thus also increasing the biocompatibility of the sensor. The resulting ISE membranes showed faster signal stabilization of the sensor response compared with that of the PVC matrix and also better reproducibility and stability, thus making these platforms highly suitable candidates for the manufacture of robust implantable sensors.

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Section: Resultssupporting

confidence: 58%

Miniaturizable Ion-Selective Arrays Based on Highly Stable Polymer Membranes for Biomedical Applications

Mir

Lugo

Tahirbegi

et al. 2014

Sensors

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“…Amine-terminated xerogels have previously been used in the production of multiple optical (e.g., pH), 29 amperometric (e.g., CO 2 , NO) 30,31 and enzyme-based (e.g. glucose) 32,33 sensors and biosensors.…”

Section: Mn II (No)tpps Formation In Xerogel Filmsmentioning

confidence: 99%

Xerogel Optical Sensor Films for Quantitative Detection of Nitroxyl

2008

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Xerogel films were synthesized via sol-gel chemistry to fabricate optical nitroxyl (HNO) sensors. Selective detection of HNO in solution was achieved by monitoring the rates of manganese(III) meso-tetrakis(4-sulfonatophenyl) porphyrinate (Mn III TPPS) reductive nitrosylation in the anaerobic interior of aminoalkoxysilane-derived xerogel films. Nitroxyl permeability in sensor films deposited in round-bottom 96-well plates was enhanced via incorporation of trimethoxysilylterminated poly(amidoamine-organosilicon) (PAMAMOS) dendrimers in the xerogel network. The selectivity of Mn III TPPS for HNO, the overall sensitivity, and the working dynamic range of the resulting sensors were characterized. The HNO-sensing microtitre plates were used to quantify pH-dependent HNO generation by the recently described HNO-donor sodium-1-(isopropylamino)diazene-1-ium-1,2-diolate (IPA/NO), and compare HNO-production efficiency between IPA/NO and Angeli's salt, a traditional HNO-donor.

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“…The electrode lifetime was investigated by performing the calibration curve and the periodical testing of standard solutions (1x10 -6 -1x10 -2 M PRED) and calculating the response slopes. It was observed that the proposed electrodes exhibited good stabilities in terms of slope in the linear domain of concentration and the electrodes can be used continually for about 1.5 months without considerable decrease in its slope value [25].…”

Section: Life Time Of the Ion Selective Electrodementioning

confidence: 94%

Potentiometric Determination of Prednisolone in Pharmaceutical Formulations

Gehan

Mohammed

2021

J. Adv. Chem. Sci.

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In this present work, a prednisolone ion selective electrode (PRED-ISE) has been developed. The electrode shows linear response towards prednisolone in the range 3.0×10−6 – 8.6×10−3 M with a detection limit of 2.5×10−6. PRED-ISE was used as an indicator electrode for the potentiometric titration of different concentrations of standard prednisolone against standardized sodium tetraphenyl borate solution and in tablets. The electrode manifests advantages of low resistance, fast response and, most importantly, good selective relativity to a variety of other cations.

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Sol−Gel Derived Potentiometric pH Sensors

Cited by 23 publications

References 42 publications

Miniaturizable Ion-Selective Arrays Based on Highly Stable Polymer Membranes for Biomedical Applications

Miniaturizable Ion-Selective Arrays Based on Highly Stable Polymer Membranes for Biomedical Applications

Xerogel Optical Sensor Films for Quantitative Detection of Nitroxyl

Potentiometric Determination of Prednisolone in Pharmaceutical Formulations

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