Plastic Membrane Selective Electrodes for Chlortetracyclinium Ion Based on Chlortetracyclinium-Phosphotungstate and Phosphomolybdate Ion-Pair Associates

El-Ansary, A. L.; Issa, Y. M.; Tag-Eldin, Ahmed S.

doi:10.1002/1521-4109(200110)13:14<1203::aid-elan1203>3.0.co;2-m

Cited by 7 publications

(2 citation statements)

References 15 publications

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“…3). However the potential decreases gradually at pH values higher than 6.6 , the decrease may be attributed to hydroxide ions that react with TFPH drug leading to formation of free drug in the test solution, neutral species, which could not be penetrated into the membrane [19] and pH values lower than 2.7, the potential readings decrease which can be related to interference of hydronium ion [20].…”

Section: Effect Of Phmentioning

confidence: 99%

Determination of Trifluoperazine hydrochloride by New Constructed Coated Carbon Selective Electrodes

Mohammed

Khaleel

2019

گۆڤاری زانستە مرۆڤایەتیەکانی زانکۆی گەرمیان

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In this research, two coated carbon electrodes were constructed and used for the determination of Trifluoperazine hydrochloride (TFPH) drug. The electrodes were constructed by preparing ion-pair for (TFPH) with phosphotungstic acid (PTA) or phosphomolybdic(PMA) acid using di butyl phthalate (DBP) as a plasticizer and poly vinyl chloride (PVC) as a matrix. These electrodes showed good sensitivity towards TFPH. Optimum temperature range (25 -55 and 25 -50) o C, limit of detection (4.99  10 -6 and 4.56  10 -6 ) M ,correlation coefficient, (0.9990 and 0.9980), slope (30.67 and 30.26) mV/decade for TFPH-PTA and for TFPH-PMA electrodes respectively.. Optimum pH range (2.7-6.6), the life time (48) days and linear range was (110 -5 -110 -2 ) M for both electrodes. These electrodes were successfully applied for determination of TFPH in pure and pharmaceutical preparations form.

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Section: Effect Of Phmentioning

confidence: 99%

Determination of Trifluoperazine hydrochloride by New Constructed Coated Carbon Selective Electrodes

Mohammed

Khaleel

2019

گۆڤاری زانستە مرۆڤایەتیەکانی زانکۆی گەرمیان

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“…It is worth noting that at more than pH 7 a white precipitate of drug is formed and that may be the cause of potential decrease. At pH values lower than 2 the potential readings decrease which can be related to interference of hydronium ion [22,23].…”

Section: Effect Of Phmentioning

confidence: 99%

Construction of New Coated Carbon Electrodes for Determination of Sildenafil Citrate Drug

Mohammed¹,

Khaleel²,

Ahmed³

2020

KUJSS

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In this research, new coated carbon electrodes were constructed and used for the determination of Sildenafil citrate (SILC) drug. The electrodes were constructed by preparing ion-pair for (SILC) with phosphotungstic acid (PTA) or phosphomolybdic (PMA) acid using dibutyl phthalate (DBP) as a plasticizer. These electrodes showed good sensitivity towards SILC with linear range of (1.010-7-1.010-2) M, correlation coefficient, (0.9990), the life time (120) days, optimum temperature range (23-65) o C and optimum pH range (2-5) for both electrodes, limit of detection (5.05510-8 and 5.11610-8) M, slope (57.29 and 59.10) mV/decadefor SILC-PTA and SILC-PMA electrodes respectively. These electrodes were successfully applied for determination of SILC in pure and pharmaceutical preparation form(tablets) with recovery of not less than 98%.

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Evaluation of a PVC‐Based Thionine‐Zeolite and Zeolite Free Membranes as Sensing Elements in Ion Selective Electrode

et al. 2004

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The construction and performance characteristics of thionine electrodes based on the ion-pair complex thioninetungstophosphate and thionine-mordenite zeolite embedded in a polyvinyl chloride (PVC) matrix is described. Thionine electrode based on the ion-pair is used for the indirect determination of ascorbic acid by standard addition method.Keywords: Thionine-tungstophosphate(TH-TP), Thionine-mordenite, Ion selectiive electrodes, Ascorbic acidThe incorporation of zeolites into electrochemical systems has received increasing attention during recent years. Advances in the modification of electrode surface with zeolites have been extensively reviewed by Rolison [1] and Walcarius [2,3]. Zeolites due to their precisely uniform crystal lattice with pores of molecular dimension, into which guest molecules can penetrate, possess outstanding potentialities for use in electroanalytical measurements.The unique properties of zeolites have been utilized for developing zeolite modified voltammetric/amperometric electrodes exhibiting enhanced selectivity [4,5]. On the other hand, the ion exchange properties of zeolites make them an inevitable candidate for preparing ion-selective membranes for potentiometric cation sensing. The first report on the use of a zeolite-based membrane electrode is that of Marshall [6] who dispersed zeolite particles within an insulating cement matrix. Later, Barrer and James [7] exploited the size selectivity of zeolite A in rejecting the tetraethylammonium cation (too large to fit inside the microporous structure [8]), by preparing membranes made of zeolites embedded in thermoplastic resins, and applying them for the selective detection of sodium ions over tetraethylammonium species. Johansson et al. [9,10] have reported the impregnation of mordenite-type zeolite pellet with low viscosity epoxy resins. The resulting membrane was then successfully applied to the detection of cesium ions, with a significant selectivity relative to the other alkali metal cations and some divalent species. Baker et al. [11] and Demertzis et al. [12,13] investigated the influence of the epoxy resin phase on the main characteristic properties of a potentiometric zeolite electrode, which was reported to be sensitive to alkali metal and other metal cations without a remarkable selectivity of any cation. The electrodes based on the incorporation of zeolite particles into polydimethylsiloxane membranes were applied by Matysik et al. [14] to the potentiometric detection of alkali-metal cations. Potentiometric investigations in non-aqueous media using pressed zeolite disks were described by Dryfe et al. [15]. Recent advances in the potentiometric application of zeolitemodified electrodes includes construction of a disposable electrode for determination of surfactants [16] and an enzymatic biosensor incorporating zeolite for determination of urea [17,18].Thionine is a cationic dye and can fill in the zeolite channels by an ion exchange method [19,20]. Thionine, is an antimethemoglobinemic agent and an antidote to cyani...

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Plastic Membrane Selective Electrodes for Chlortetracyclinium Ion Based on Chlortetracyclinium-Phosphotungstate and Phosphomolybdate Ion-Pair Associates

Cited by 7 publications

References 15 publications

Determination of Trifluoperazine hydrochloride by New Constructed Coated Carbon Selective Electrodes

Determination of Trifluoperazine hydrochloride by New Constructed Coated Carbon Selective Electrodes

Construction of New Coated Carbon Electrodes for Determination of Sildenafil Citrate Drug

Evaluation of a PVC‐Based Thionine‐Zeolite and Zeolite Free Membranes as Sensing Elements in Ion Selective Electrode

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