Performance characteristics and regeneration of a tetraphenylboron(III) selective electrode

Shoukry, A; Badawy, Sayed S.; Issa, Y. M.

doi:10.1021/ac00135a003

Cited by 31 publications

(10 citation statements)

References 27 publications

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“…DLX-TPB ion pair was prepared likewise by a technique that described previously. [11] The assent between calculated and found values was approving very well the postulated stoichiometry; the 1:1 (DLX: TPB) molar ratio stoichiometry was also confirmed by elemental analysis.…”

Section: Experimental Reagentssupporting

confidence: 66%

Untitled

Al‐Qahtani¹

2017

AJP

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Aim: An electrode of coated wire duloxetine-selective type was prepared and categorized in aqueous solution as a sensor for duloxetine hydrochloride (DLX) determination and in pharmaceutical preparations by the standard addition method, at 25°C. Materials and Methods: Local drug stores were the pharmaceutical preparations containing DLX (Cymbalta ® , 60 mg DLX/capsules and Yentreve ® , 20 mg DLX/capsules). Potentiometrically, DLX was determined by standard addition method utilizing the investigated electrode. Standard DLX solution in small increments 1.0 × 10 −2 M was added to 50 mL aliquot samples of various drug concentrations in the standard addition method. Variation in potential reading at a constant temperature of 25°C was documented for each increment and used to calculate the drug sample solution concentration. Results and Discussion: The electrode shows a linear response with slope of 59.0 mV per duloxetine concentration decade for optimum electrode 9.0% at 25°C ± 0.1°C when pH of test solution was in the range of 4.0-9.0at with potentiometric responses were independent. In the presence of different inorganic cations, sugars and amino acids that electrode shown good selectivity for DLX. It was successfully used for potentiometric determination of DLX both in pure solutions and in pharmaceutical preparations. Conclusion: According to membrane electrode of the coated wire type, the DLX exhibited advantages of simple design and operation, reasonable selectivity, and fast response. Further, the electrode can be used by direct pure form potentiometry and in pharmaceutical preparations to DLX determination.

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Section: Experimental Reagentssupporting

confidence: 66%

Untitled

Al‐Qahtani¹

2017

AJP

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“…The electrode was constructed as previously described [7]. Four different membrane compositions were tried (Table 1).…”

Section: The Electrodementioning

confidence: 99%

Plastic Membrane Selective Electrode for Cetirizinium Ion Based on Cetirizinium-Tetraphenylborate Ion-Pair

Shoukry¹,

Abdel‐Ghani

Issa

et al. 1999

Electroanalysis

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New cetirizinium (Cet) ion selective PVC membrane electrodes of both conventional and coated graphite types based on the ion-pair of cetirizine with tetraphenylborate are prepared. Both electrodes exhibited a mean calibration plot slope of 66.8 mVy (Cet) Outside the working pH-ranges, the potential value decreases due to formation of diprotonated species on the acidic side and to formation of the free base on the alkaline side. The standard electrode potentials are determined at different temperatures and used to calculate the isothermal coef®cient of the electrode (0.000875 Vy C). The electrode shows a very good selectivity for Cet-HCl 2 with respect to a large number of inorganic cations and sugars where selectivity coef®cients ranging between 7.0610 À5 and 3.1610 À3 were obtained. The standard addition method is successfully applied to determine Cet-HCl 2 in pure solutions and in cetirizine dihydrochloride-containing tablets.

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“…A regeneration process for the exhausted conventional electrodes has been developed by dipping alternately in 10 À2 mol dm À3 CTC.Cl and PTA or PMA solutions for 1 hour at three alternative times [15]. The coated wire electrodes can be regenerated by quickly dipping the exposed end into the coating solution (described previously under membrane compositions).…”

Section: Regeneration Of the Electrodesmentioning

confidence: 99%