Inexpensive device for measurements with ion-selective and pH electrodes |
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Authors: | L Victoria A Arenas MG Ortega RM Barzanallana JA Ibáñez |
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Institution: | Departamento de Fisica Aplicada, Facultad de Ciencias, Universidad de Murcia, 30071 Murcia Spain |
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Abstract: | The design and construction of a simple device for measuring ionic concentrations (or pH) with ion-selective electrodes are described. The automated system includes a special electronic circuit with an operational amplifier, a signal conditioner and a personalcomputer. A digital multimeter can be used if automation is not required. The results obtained in tests with iodide-, chloride- and nitrate-selective electrodes and glass electrodes show very good agreement with those obtained with sophisticated commercial apparatus. |
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