Nitrite‐Selective Electrode Based On Cobalt(II) tert‐Butyl‐Salophen Ionophore |
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| Authors: | Bastien Néel Majid Ghahraman?Asfhar Gastón A Crespo Marcin Pawlak Denis Dorokhin Eric Bakker |
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| Institution: | Department of Inorganic and Analytical Chemistry, University of Geneva, Quai Ernest‐Ansermet 30, CH‐1211 Geneva, Switzerland |
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| Abstract: | A series of polymeric nitrite‐selective electrodes containing a new lipophilic ionophore Co(II) tert‐butyl‐salophen is reported. The stability of Co(II) ionophores within a PVC‐based membrane was investigated by leaching experiments. Different membrane compositions were explored in order to reach the lowest possible limit of detection for a PVC‐based nitrite selective polymeric membrane electrode containing this ionophore. The optimal electrode showed a limit of detection of 2×10?6 M and exhibited four orders of magnitude of discrimination over nitrate, chloride and bromide. The electrodes were evaluated in undiluted human urine and attest to the robustness of the ionophore. |
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| Keywords: | Nitrite Ion‐selective electrode Salophen Selectivity Potentiometry |
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