New Conventional Coated-Wire Ion-Selective Electrodes for Flow-Injection Potentiometric Determination of Chlordiazepoxide
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- ISSA Y. M.
- Chemistry Department, Faculty of Science, Cairo University
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- ABDEL-GHANI N. T.
- Chemistry Department, Faculty of Science, Cairo University
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- SHOUKRY A. F.
- Chemistry Department, Faculty of Science, Cairo University
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- AHMED Howayda M.
- Chemistry Department, Faculty of Science, Cairo University
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Description
New chlordiazepoxide hydrochloride (Ch-Cl) ion-selective electrodes (conventional type) based on ion associates, chlordiazepoxidium-phosphomolybdate (I) and chlordiazepoxidium-phosphotungstate (II), were prepared. The electrodes exhibited mean slopes of calibration graphs of 59.4 mV and 60.8 mV per decade of (Ch-Cl) concentration at 25°C for electrodes (I) and (II), respectively. Both electrodes could be used within the concentration range 3.16 × 10-6 - 1 × 10-2 M (Ch-Cl) within the pH range 2.0 - 4.5. The standard electrode potentials were determined at different temperatures and used to calculate the isothermal coefficients of the electrodes, which were 0.00139 and 0.00093 V °C-1 for electrodes (I) and (II), respectively. The electrodes showed a very good selectivity for Ch-Cl with respect to the number of inorganic cations, amino acids and sugars. The electrodes were applied to the potentiometric determination of the chlordiazepoxide ion and its pharmaceutical preparation under batch and flow injection conditions. Also, chlordiazepoxide was determined by conductimetric titrations. Graphite, copper and silver coated wires were prepared and characterized as sensors for the drug under investigation.
Journal
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- Analytical Sciences
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Analytical Sciences 21 (9), 1037-1042, 2005
The Japan Society for Analytical Chemistry
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Details 詳細情報について
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- CRID
- 1390001204257631104
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- NII Article ID
- 130004826468
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- NII Book ID
- AA10500785
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- COI
- 1:CAS:528:DC%2BD2MXhtlGnu7nM
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- ISSN
- 13482246
- 09106340
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- NDL BIB ID
- 7693698
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed