A rapid cadmium determination based on ion selective membrane potentiometric sensor by bis (salicylaldehydo)ethylenediimine as carrier

Volume 4, Issue 02, Pages 25-33, Jun 2021 *** Field: Analytical Chemistry

  • Mahdiyeh Ghazizadeh, (Corresponding Author) Department of Chemistry, Kerman branch, Islamic Azad University, Kerman, Iran, P. O. Box 7635131-167
  • Hamideh Asadollahzadeh Department of Chemistry, Kerman branch, Islamic Azad University, Kerman, Iran, P. O. Box 167-7635131
Keywords: Cadmium, Ion selective electrode, Membrane sensor, Potentiometry, Salen, Water samples


An ion selective potentiometric electrode (IPE) was prepared based on salen material (bis(salicylaldehydo)ethylenediimine) as a suitable carrier for determination of cadmium ions. An acceptable response for cadmium ions obtained over a linear range 8 × 10−7 to 1.0 × 10−2 M with a slope of 29.8 ± 0.8 mV per decade of activity and a detection limit of 3.2 × 10−7 M for Cd (II) ions in water and liquid samples. It has a response time less than 10 s and can be used for at least 2.5 months without any measurable divergence in potential.  The ion selective electrode can be used based on potential and potential changes in the pH range 3.5 to 6.5, so, the cadmium determination was obtained at independent pH. Moreover, the selectivity of proposed method in presence of interference ions was studied. The results showed that the other cations do not interfere significantly in response electrode at optimized pH. This electrode was successfully used for the determination of cadmium ions in aqueous samples. The validation was obtained based on ICP analyzer and certified reference material in water samples (CRM, NIST).


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How to Cite
Ghazizadeh, M., & Asadollahzadeh, H. (2021). A rapid cadmium determination based on ion selective membrane potentiometric sensor by bis (salicylaldehydo)ethylenediimine as carrier. Analytical Methods in Environmental Chemistry Journal, 4(02), 25-33. https://doi.org/10.24200/amecj.v4.i02.136
Original Article