A Novel Sulfate Polymeric Membrane Sensor Based on a New Bis-Pyrylium Derivative

✍ Scribed by Mohammad Reza Ganjali; Simindokht Shirvani-Arani; Parviz Nourozi; Davood Salimzadeh; Madjid Faal-Rastegar; Abolghasem Moghimi

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 93 KB
• Volume: 16
• Category: Article
• ISSN: 1040-0397
• DOI: 10.1002/elan.200302905

✦ Synopsis

Abstract

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.