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A Novel Sulfate Polymeric Membrane Sensor Based on a New Bis‐Pyrylium Derivative
Author(s) -
Ganjali Mohammad Reza,
ShirvaniArani Simindokht,
Nourozi Parviz,
Salimzadeh Davood,
FaalRastegar Madjid,
Moghimi Abolghasem
Publication year - 2004
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.200302905
Subject(s) - potentiometric titration , sulfate , membrane , inorganic chemistry , chemistry , electrode , detection limit , barium sulfate , potentiometric sensor , titration , ion selective electrode , ion , selectivity , analytical chemistry (journal) , chromatography , organic chemistry , biochemistry , catalysis
A novel ion‐selective polymeric membrane sensor based on pyrylium‐4,4‐(1,4‐phenylen) bis[2,6‐bis(2‐naphthyl)]‐bis[tetrafluoroborate] (PBGNB) as an excellent sensing material is successfully developed. The electrode possesses the advantages of a very low detection limit (5.0×10 −8 M), a wide working concentration range (1.0×10 −8 −1.0×10 −1 M) and specially, a high sulfate selectivity over most common organic and inorganic anions. The sensor displays Nernstian behavior (slope of 29.5±0.5 mV per decade) in a wide pH range (3.0–8.5). It shows a short response time in the whole concentration range (ca. 10 s). The electrode was used as an indicator electrode in the potentiometric titration of sulfate ions with barium ions. The proposed sensor was successfully applied to the direct determination of salbutamol sulfate and paromomycin sulfate.