Magnetic chitosan-zeolite composite as an adsorbent in ultrasound-assisted magnetic solid phase extraction of tetracyclines in water samples

Mpho Charmaine Lefatle, Lawrence Mzukisi Madikizela, Vusumzi Emmanuel Pakade, Philiswa Nosizo Nomngongo

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

An ultrasound-assisted magnetic solid-phase extraction method was developed to pre-concentrate tetracyclines (TCs) in wastewater and river water. The magnetic chitosan-zeolite composite was used as an adsorbent. The morphological and structural properties of the adsorbent were characterised by various analytical techniques. The factors affecting the ultrasound-assisted magnetic solid-phase extraction method were optimised using a central composite design. A high performance liquid chromatography equipped with a photodiode array detector was used to quantify TCs in wastewater and river water samples. Under optimised parameters, the developed analytical approach gave acceptable linearity (LOQ-400 µg L−1) with correlation coefficients exceeding 0.993, while the detection and quantitation limits ranged from 0.05–0.67 and 0.14–2.03 µg L−1, respectively. Attained recoveries were 90–101%, with intraday and interday precision expressed as the relative standard deviation (%RSD) below 5%. Even though the target analytes (tetracycline, oxytetracycline and oxytetracycline) were not detected in environmental samples, the synthesised adsorbent was suitable for the isolation of TCs in a complex matrix resulting in an accurate, precise, rapid and sensitive analytical method.

Original languageEnglish
Article number28
JournalJournal of Analytical Science and Technology
Volume14
Issue number1
DOIs
Publication statusPublished - Dec 2023

Keywords

  • Environmental monitoring
  • Response surface methodology
  • Tetracyclines
  • Ultrasound-assisted magnetic solid phase extraction
  • Wastewater

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • General Biochemistry,Genetics and Molecular Biology
  • General Environmental Science
  • General Physics and Astronomy

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