Copper (II)-selective membrane electrodes based on Cu (II)-schiff base complexes as an ionophore

Tastekin M., Tunali F., Atakol O., Kilic E.

Reviews in Analytical Chemistry, cilt.26, sa.3, ss.155-168, 2007 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 26 Sayı: 3
  • Basım Tarihi: 2007
  • Dergi Adı: Reviews in Analytical Chemistry
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.155-168
  • Anahtar Kelimeler: potentiometry, Copper (II)-selective electrode, Schiff base-copper complexes, PVC membrane, determination of copper, alloys, ION-SELECTIVE ELECTRODES, DERIVATIVE SCHIFFS BASE, LIQUID-MEMBRANE, CARRIER, AMMONIA
  • Ankara Üniversitesi Adresli: Evet

Özet

A new PVC membrane electrode for copper (II) ion based on the mixture of mononuclear aqua-[N,N'-bis(salicylidene)-1,3-propane-diaminato]copper (II) (I) and dinuclear dioxane-[N,N'-bis(salicylidene)-1,3-propane-diaminato]dicopper (II) dichloride (II) is developed. The electrode exhibits a Nernstian response for copper (II) ion over a wide concentration range, 1.0 × 10-1 - 3.2 × 10-5 M with a slope of 28.3 mV per decade. It has a relatively fast response time, 20 - 30 s, and can be used for at least four months without any considerable divergence in potential. The proposed electrode shows a high selectivity against Ca (II), Co (II), Zn (II), Ni (II), Mg (II), Sr (II), Ba (II), Cd (II), Al (III), Na (I). Hg (II) and Mn (II) and can be used in a pH range 4.5-6.5. Only Ag (I) ion was observed to have a significant interference. It is successfully used as an indicator electrode in potentiometric titration of copper (II) with EDTA and direct potentiometric determination of copper.