Poly(4-vinylpyridine)isopentyl bromide based selective electrode with PVC matrix in aqueous media

A selective PVC-membrane based on “poly(4-vinylpyridine)isopentyl bromide” as a carrier is tested as an ion sensor. This sensor reveals a linear response towards Br-, Cl-, I-, IO3 - and NO3 - ions in the concentration range (10-4 - 10-1 M. The potentiometric behaviour of the electrode is independent of the pH in test solutions with a slope near 59 mV per decade in middle in the range 4 < pH < 9. The electrode possesses a satisfactory reproducibility and a fast response time.