International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2569

Full Length Research Paper

Design, construction and investigating functionality of a nickel (II) ion selective electrode

Fekri Lari F.1*, Baghdar E.1, Aghaie M.2, Zare K.3 and Aghaie H.3
  1Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran. 2Faculty of Chemistry, North Tehran Branch, Islamic Azad University, Tehran, Iran. 3Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran.
Email: [email protected]

  •  Accepted: 27 March 2012
  •  Published: 30 April 2012

Abstract

 

Ni2+ ion–selective electrode (Ni-ISE) based on plasticized poly(vinyl chloride) (PVC) membrane with 25, 26, 27 tri propoxy 28, Amino 5, 11, 17, 23–tetra–tert–butyl–calix[4]arene as ionophore and dibutyl phthalate (DBP) as plasticizer was designed and constructed. The Ni-ISE showed a linear reply in the concentration range of 1.0 × 10-1 to 1.0 × 10-4 M with slope of 29.3 ± 0.5 mV/decad. The Ni-ISE response time was ≤ 6 s and was used for two months with no deviation in the pH range 4 to 9. The best performance was obtained with a membrane composition of 30% PVC, 62% DBP, 3% 25, 26, 27–tripropoxy–28, amino 5, 11, 17, 23–tetra–tert–butyl-calix[4]arene and 5% potassium tetrakis[p–cholorophenyl]borate (KTpClPB). Its detection limit was 1.0 × 10-5 M. The selectivity coefficients  for different cations were calculated by the matched potential method (MPM). The scanning electron microscopy (SEM) of the Ni-ISE’s membranes showed some morphological changes during its life span, probably due to both the reaction between the Ni2+ ion and / or less of the membrane parts by permeation.

 

Key words: Ni2+ ion–selective electrode, 25, 26, 27 tri propoxy 28, amino 5, 11, 17, 23–tetra–tert–butyl–calix[4]arene; scanning electron microscopy (SEM).