Chemometrically-Assisted Fabrication of a Potentiometric Sensor for Potassium Ion Based on Kryptofix 22 Ionophore


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Аннотация

A novel ion-selective membrane electrochemical sensor based on Kryptofix 22 as an ionophore was constructed for determination of potassium ion in real samples. The D-optimal mixture design (D‑OMD) was used as an experimental design strategy for optimal formulation of the membrane ingredients. The fabricated electrode exhibits a Nernstian slope of 59.80 ± 0.65 mV per decade and a linear range of 1.0 × 10–4 to 1.0 × 10–1 mol/L with respect to potassium ion at the pH range of 3.0 to 7.0 and its detection limit was found to be 6.2 × 10–5 mol/L. The response of the electrode is very stable and it exhibits a good reproducibility with a fast response time (~10 s). The experimental results, showed a good selectivity towards the K+ ion at present of interfering ions. The obtained results by using D-OMD showed a non-linear relation between the slope of the electrode and its ingredients. The proposed electrode was successfully applied for determination of potassium ion in vegetables and urine samples.

Авторлар туралы

Mahboubeh Vafi

Department of Chemistry, Mashhad Branch, Islamic Azad University

Email: ghrounaghi@yahoo.com
Иран, Mashhad

Gholam Rounaghi

Department of Chemistry, Mashhad Branch, Islamic Azad University

Хат алмасуға жауапты Автор.
Email: ghrounaghi@yahoo.com
Иран, Mashhad

Zarrin Es’haghi

Department of Chemistry, Payam Noor University

Email: ghrounaghi@yahoo.com
Иран, Tehran

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