Construction of Indium (III) Selective Electrodes Based on Promethazine Hydrochlorid in A PVC Matrix Membrane

Hamid Al-Saidi, Khaleda

	Construction of Indium (III) Selective Electrodes Based on Promethazine Hydrochlorid in A PVC Matrix Membrane
Al-Mustansiriyah Journal of Science
Article 1, Volume 22, Issue 4, 2011, Pages 147-158
Author
Khaleda Hamid Al-Saidi
Abstract
Indium selective electrodes were constructed based on based on using promethazine hydrochloride (PMH) and sodium tetraphenylborate (NaTPB) as additive with using these plasticizers: Di-butyl phthalate (DBPH); Di-octyl phthalate (DOP); Di-butyl phosphate (DBP); Tri-butyl phosphate (TBP); ortho-nitro phenyl octyl ether (ONPOE) in PVC matrix respectively. The study include slope in Nernst equation, detection limit, liner range, lifetime, pH effect and selectivity coefficient. These electrodes give slopes (26.92, 19.85, 16.78, 12.53 and 37.25 mV/decade) and give linear ranges from (1x10-5-1x10-1 M, 1x10-4-1x10-1 M, 1x10-6-1x10-1 M, 1x10-5-1x10-1 M and 1x10-5-1x10-1 M). The detection limit for the electrode based on DOP was 8×10-7 M. The measurement interferences in the presence of (Na+, K+, Mn+2, Cu+2, Ca+2, Fe+3, Al+3) were studied for determination selectivity coefficient (KpotA,B). The complex of Indium (III) and promethazine hydrochloride was studied by UV-spectrophotometric method to improve the electrode working from the pH rang effect and complex formation. The ratio of Indium to promethazine hydrochloride (1:3).

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