The development of an optical pH sensor based on immobilization of a luminescent ruthenium complex, [Ru(bpy)2(dhphen)]2+(bpy = 2,2@?-bipyridine, dhphen = 4,7-dihydroxy-1,10-phenanthroline) in Nafion film is described. The sensor has a useful pH range of 1-8. The typical response time of the sensing film is 2-5 min. The polyanionic nature of the Nafion film eliminates interference from anions. The sensor also shows minimal interference effects from alkali metal and divalent cations and has good photostability and reproducibility.
|Number of pages||5|
|Publication status||Published - 1 Jan 1998|
ASJC Scopus subject areas
- Analytical Chemistry
- Environmental Chemistry