Chitosan magnetic hydrogel based ligandless magnetic solid phase extraction for the accurate and sensitive determination of thallium by slotted-quartz tube flame atomic absorption spectrophotometry with matrix matching calibration strategy

Esra Maltepe, Elif Öztürk Er, Sezgin Bakırdere*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

In this study, a promising method was developed for the determination of thallium at trace levels by applying chitosan based magnetic solid phase extraction using slotted quartz tube atomic absorption spectrometry. Chitosan based magnetic hydrogels (CMH) were synthesized and used as solid phase extraction sorbents. The variable parameters required for the extraction method such as hydrogel amount, adsorption period and eluent volume were optimized, and under the optimized conditions, limits of detection and quantification values were recorded as 12 and 39 ng/mL, respectively. Real sample applications were performed to test the accuracy of the proposed method. For this purpose, recovery studies were carried out in two different spiking concentrations of thallium in lake water, well water and wastewater samples using the developed extraction/preconcentration method (chitosan magnetic hydrogel based ligandless magnetic solid phase extraction, CMH-LMSPE). The obtained percent recovery values of 87.2–113.2% confirmed the applicability of the method with high accuracy and precision.

Original languageEnglish
Article number105231
JournalMicrochemical Journal
Volume158
DOIs
Publication statusPublished - Nov 2020
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2020 Elsevier B.V.

Keywords

  • Chitosan
  • Hydrogels
  • Magnetic solid phase extraction
  • Thallium

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