scholarly journals Construction and Evaluation of Scopolamine Ion- Selective Electrode

2000 ◽  
Vol 68 (3) ◽  
pp. 247-261
Author(s):  
A. Shalaby ◽  
M. El-Maamly ◽  
H. Abdellatef
Keyword(s):  
Pharmaceutical Preparations ◽  
Electrode System ◽  
Potentiometric Determination ◽  
Membrane Electrode ◽  
Selective Membrane ◽  
Nernstian Slope ◽  
Ion Associate ◽  
Ph Range ◽  
Associate Species

The construction of plasticised PVC matrix-type scopolamine ion- selective membrane electrode and its use in the potentiometric determination of scopolamine in pharmaceutical preparations are described. It is based on the use of tlie ion-associate species, fonned by scopolainine cation and 5-nitrobarbitoric counter ion. The basic electrode peifonnance characteristics are evaluated according to IUPAC I-ecoininendatioiis. It exhibited a linear response for 1x10-2–1x10-5 M of scopolamine solutions with a cationic Nernstian slope over the pH range of 4-7. Common organic and inorganic cations showed negligible interference. Direct potentiometric determination of 1x10-2–1x10-5 M aqueous tubocurarine chloride using this membrane electrode system showed an average recovery of 99.05 with a mean standard deviation of 0.12. This electrode system was successfully applied to the potentiometric determination of scopolamine in some pharmaceutical preparations.

Novel palladium(II) selective membrane electrode based on 4-[(5-mercapto-1,3,4-thiadiazol-2-ylimino)methyl]benzene-1,3-diol

2010 ◽  
Vol 75 (5) ◽  
pp. 563-575 ◽  
Author(s):  
Moslem Mohammadi ◽  
Mehdi Khodadadian ◽  
Mohammad K. Rofouei
Keyword(s):  
Limit Of Detection ◽  
Membrane Electrode ◽  
Aqueous Samples ◽  
Selective Determination ◽  
Poly Vinyl Chloride ◽  
Selective Membrane ◽  
Ph Range ◽  
Palladium Content ◽  
Methyl Benzene

A plasticized poly(vinyl chloride) membrane electrode based on 4-[(5-mercapto-1,3,4-thiadiazol-2-ylimino)methyl]benzene-1,3-diol (L) for highly selective determination of palladium(II) (in PdCl42– form) is developed. The electrode showed a good Nernstian response (29.6 ± 0.4 mV per decade) over a wide concentration range (3.1 × 10–7 to 1.0 × 10–2 mol l–1). The limit of detection was 1.5 × 10–7 mol l–1. The electrode has a response time of about 20 s, and it can be used for at least 2 months without observing any considerable deviation from Nernstian response. The proposed electrode could be used in the pH range of 2.5–5.5. The practical utility of the electrode has been demonstrated by its use for the estimation of palladium content in aqueous samples.

scholarly journals Zirconium(IV) Phosphoborate-Based Ion Selective Membrane Electrode for Potentiometric Determination of Ba(II) Ions

2017 ◽  
Vol 29 (2) ◽  
pp. 375-380 ◽  
Author(s):  
Sandeep Kaushal ◽  
Susheel K Mittal ◽  
Anirudh Pratap Singh ◽  
Pritpal Singh
Keyword(s):  
Potentiometric Determination ◽  
Membrane Electrode ◽  
Selective Membrane

scholarly journals Construction of Eu3+Ion-Selective Electrode Based on 1,2-Diaminopropane-N,N,N',N'-tetraacetic acid

2011 ◽  
Vol 8 (s1) ◽  
pp. S467-S473 ◽  
Author(s):  
Mohammad Reza Abedi ◽  
Hassan Ali Zamani
Keyword(s):  
Alkaline Earth ◽  
Dynamic Range ◽  
Pvc Membrane ◽  
Membrane Electrode ◽  
Tetraacetic Acid ◽  
Pvc Membrane Electrode ◽  
Nernstian Slope ◽  
Wide Linear Dynamic Range ◽  
Ph Range

A new Eu3+PVC membrane electrode based on 1,2-diaminopropane-N, N,N',N'-tetraacetic acid (DAPTA) as a suitable ionophore has been prepared and studied. The electrode shows a good selectivity for Eu(III) ion with respect to most common cations including alkali, alkaline earth, transition and heavy metal ions. This electrode has a wide linear dynamic range from 1.0×10-6to 1.0×10-2M with a Nernstian slope of 19.7±0.5 mV per decade and a low detection limit of 7.2×10-7M in the pH range of 2.5–9.1, while the response time was rapid (<10 s). The practical utility of the electrodes has been demonstratedby their use as indicator electrodes in the potentiometric titration of Eu3+ions with EDTA and for the determination of Eu3+in some water sample solutions.

Kinetic potentiometric determination of creatinine in serum with a picrate ion-selective membrane electrode.

1981 ◽  
Vol 27 (3) ◽  
pp. 455-457 ◽  
Author(s):  
E P Diamandis ◽  
T P Hadjiioannou
Keyword(s):  
Electrode Potential ◽  
Kinetic Method ◽  
Potentiometric Determination ◽  
Membrane Electrode ◽  
Selective Electrode ◽  
Creatinine Concentration ◽  
Analytical Recovery ◽  
Selective Membrane ◽  
Method R

Abstract We describe a new kinetic method for potentiometric determination of creatinine in serum, based on the creatinine--picrate reaction in alkaline medium (Jaffé reaction). The reaction is monitored with a picrate-selective electrode, and the increase in electrode potential during 270 s is measured and related directly to the creatinine concentration. Small cation-exchange columns are used to separate creatinine from interfering substances. Analytical recovery of creatinine added to serum was 100.7%. Results for a series of samples compared well with results obtained with a spectrophotometric method (r = 0.994).

New Liquid Membrane Electrode for Determination of Lidocaine in Local Anesthetic Formulations

1986 ◽  
Vol 69 (4) ◽  
pp. 618-620
Author(s):  
Saad S M Hassan ◽  
Mona A Ahmed
Keyword(s):  
Local Anesthetic ◽  
Liquid Membrane ◽  
Pharmaceutical Preparations ◽  
Ion Pair ◽  
Membrane Electrode ◽  
Lidocaine Concentration ◽  
Ph Range ◽  
Liquid Membrane Electrode ◽  
The U.S

Abstract A new lidocaine-responsive liquid membrane electrode based on the use of the lidocaine reineckate ion pair complex in nitrobenzene solvent has been developed. The electrode displays a linear response for 10-2-10-5M lidocaine over the pH range of 3-6.5. The response time varies from 35 s to 1 min depending on the lidocaine concentration. The life span of the electrode is at least 1 month. Excipients and diluents commonly used in local anesthetic formulations do not interfere. Determination of lidocaine in some pharmaceutical preparations gives results with an average recovery of 99% of the nominal values and a mean standard deviation of 1.7% which compare favorably with those obtained by the U.S. Pharmacopeia method.

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