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Nitrite‐Selective Electrode Based On Cobalt(II) tert ‐Butyl‐Salophen Ionophore
Author(s) -
Néel Bastien,
Ghahraman Asfhar Majid,
Crespo Gastón A.,
Pawlak Marcin,
Dorokhin Denis,
Bakker Eric
Publication year - 2014
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201300607
Subject(s) - ionophore , chemistry , detection limit , nitrite , bromide , electrode , membrane , inorganic chemistry , cobalt , polyvinyl chloride , chloride , nitrate , nuclear chemistry , chromatography , organic chemistry , biochemistry
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.