Trace analysis of quercetin in tea samples by HPLC-DAD system by means of a new nanocomposite including magnetic core-shell

Ulusoy S., YILMAZ E. , Erbas Z., ULUSOY H. İ. , SOYLAK M.

SEPARATION SCIENCE AND TECHNOLOGY, vol.55, no.11, pp.2025-2036, 2019 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 55 Issue: 11
  • Publication Date: 2019
  • Doi Number: 10.1080/01496395.2019.1623254
  • Page Numbers: pp.2025-2036


A new magnetic core-shell multiwalled carbon nanotube@nanodiamond nanocomposite was synthesized, characterized and used as magnetic solid-phase extraction material. The usability of material was checked on the separation and pre-concentration of quercetin in tea samples by magnetic solid-phase extraction and high-performance liquid chromatography with diode array detector system. There was a linear relationship between chromatographic area and concentration of quercetin in the range of 5.0-600 ng mL(-1). The limit of detection and quantification limits were 1.46 and 4.91 ng mL(-1), respectively. The developed method has been applied to determine quercetin at trace levels in tea samples.