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New Potentiometric Sensor for the Determination of Bromate Ion in Drinking Water
Author(s) -
Saber Amr L.
Publication year - 2016
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.201500582
Subject(s) - bromate , detection limit , bromide , chemistry , potentiometric titration , ammonium , ammonium bromide , ion , electrode , inorganic chemistry , rhodamine b , selectivity , ion selective electrode , chromatography , catalysis , organic chemistry , pulmonary surfactant , biochemistry , photocatalysis
The characteristics, performance and application of ion‐selective electrodes for bromate ion based on rhodamine B and tetrahexyl ammonium bromide as electrode‐active substances are described for the first time. These electrodes respond with sensitivities of (58.0±1.0) and (61.0±2.0) mV decade −1 over the range 1.0×10 −8 –1.0×10 −2 mol l −1 at pH 4–9 and 4–8 and a detection limit of 6.0×10 −8 and 4.0×10 −8 mol l −1 for rhodamine B and tetrahexyl ammonium bromide sensors, respectively. The electrodes are easily constructed at a relatively low cost, have a fast response time and can be used for a period of 3 months without any considerable divergence in potential. The proposed sensors displayed good selectivity for bromate ion in the presence of several substances and inorganic anions. Sensors were used for the direct assay of bromate ion in drinking water samples.