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[Benzoate determination in medicinal syrups with a PVC membrane ion selective electrode without inner reference
J L Lima1, M Conceição, B S Montenegro
1Département de Chimie Physique, Faculté de Pharmacie, Porto, Portugal.
Annales Pharmaceutiques Francaises
|January 1, 1991
Summary
New benzoate ion electrodes, free of inner reference solutions, offer a low-cost method for detecting benzoate ions. These electrodes show promise for analyzing benzoate in medical syrups.
Area of Science:
- Electroanalytical Chemistry
- Materials Science
Context:
- Development of ion-selective electrodes (ISEs) is crucial for chemical analysis.
- Traditional ISEs often require internal reference solutions, adding complexity and cost.
- There is a need for simplified, cost-effective benzoate ion sensors.
Purpose:
- To prepare and characterize novel benzoate ion-selective electrodes without an internal reference solution.
- To evaluate the response characteristics and behavior of these low-cost electrodes.
- To explore the analytical applications of these electrodes, particularly for benzoate ion determination.
Summary:
- Two types of benzoate ion-selective electrodes were fabricated using PVC membranes containing tetraoctylammonium benzoate immobilized in either dibutylphthalate (Type A) or 2-nitrophenyloctylether (Type B).
- These electrodes, applied on a conductive support, operate without an internal reference solution.
- Their response characteristics, behavior, and potential analytical applications were investigated, including the analysis of benzoate ions in medical syrups.
Impact:
- Provides a simplified and potentially more robust design for benzoate ion sensing.
- Offers a low-cost alternative for benzoate ion determination in various matrices.
- Demonstrates practical utility in the analysis of benzoate in pharmaceutical formulations like medical syrups.