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Measuring the Induced Membrane Voltage with Di-8-ANEPPS
Published on: November 19, 2009
Nickel(II) selective membrane potentiometric sensor using a recently synthesized mercapto compound as neutral carrier
Mohammad Hossein Mashhadizadeh1, Ahmad Momeni
1Department of Chemistry, Shahid Bahonar University of Kerman, Kerman 76169, Iran.
Abstract:
A PVC membrane electrode for Ni(2+) ions based on a recently synthesized mercapto compound, as an ionophore was prepared. The electrode exhibits a Nernstian slope of 28-30 mV per concentration decade at wide concentration range of (1.0x10(-2)-1.0x10(-7) M). It has a fast response time of <15 s and can be used for at least 4 weeks. The potentiometric response is independent of the pH of the test solution in the pH range 5-8.5. The proposed electrode revealed good selectivities over a wide variety of other cations including alkali, alkaline earth, transition and heavy metal ions. It was successfully applied to the direct determination and potentiometric titration of nickel ion with EDTA.
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