ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Preconcentration of tellurium using magnetic hydrogel-assisted dispersive solid-phase extraction and its determination by slotted quartz tube-flame atomic absorption spectrophotometry

Cansu Demir, Elif Öztürk Er, Bedrihan Kartoğlu, Nihan Atsever, Özlem Yağci, Miray Öner, and Sezgin Bakırdere

Department of Chemistry, Yıldız Technical University, İstanbul, Turkey

E-mail: bsezgin23@yahoo.com

Received: 31 December 2020  Accepted: 9 April 2021

Abstract:

In this study, a simple and cheap magnetic chitosan hydrogel-based dispersive solid-phase extraction (MCH-DSPE) method was developed for the determination of tellurium in wastewater, tap water and mineral water samples before its determination by slotted quartz tube-flame atomic absorption spectrophotometry (SQT-FAAS). Important parameters that affect the extraction procedure were investigated. All the system parameters such as buffer pH and volume, hydrogel amount, mixing type and period and eluent volume were optimized to increase the accuracy and sensitivity of the developed method. Under the all optimum conditions, a 78.9-fold improvement was achieved in the detection power of the conventional flame atomic absorption spectrophotometry. The limit of detection (LOD) and limit of quantification (LOQ) values were calculated as 0.019 mg L⁻¹ and 0.063 mg L⁻¹, respectively. In order to test the applicability of the method, recovery studies were carried out in mineral water, tap water and wastewater samples, and the calculated recovery results were found to be about 100%. The results showed that magnetic chitosan hydrogels were used as sorbent materials in dispersive solid-phase extraction as a simple, environmentally friendly, rapid and low-cost preconcentration process.

Keywords: Tellurium; Chitosan; Hydrogels; Magnetic solid-phase extraction; Atomic absorption spectrophotometry

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-021-01645-4

Chemical Papers 75 (8) 4261–4267 (2021)