Pyrocatechol violet impregnated magnetic graphene oxide for magnetic solid phase microextraction of copper in water, black tea and diet supplements


FOOD CHEMISTRY, vol.321, 2020 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 321
  • Publication Date: 2020
  • Doi Number: 10.1016/j.foodchem.2020.126737
  • Journal Name: FOOD CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, CAB Abstracts, Chimica, Communication Abstracts, Compendex, EMBASE, Food Science & Technology Abstracts, MEDLINE, Metadex, Veterinary Science Database, Civil Engineering Abstracts
  • Keywords: Pyrocatechol violet, Copper, Magnetic graphene oxide, Solid phase microextraction, Water, black tea and diet supplements, ATOMIC-ABSORPTION-SPECTROMETRY, ENVIRONMENTAL-SAMPLES, TRACE AMOUNTS, PRECONCENTRATION, EXTRACTION, NANOCOMPOSITE, PERFORMANCE, CU(II), IONS, LEAD
  • Erciyes University Affiliated: Yes


Pyrocatechol violet impregnated magnetic graphene oxide hybrid material (PV-MGO) was prepared as magnetic solid phase microextraction for separation and preconcentration of copper before its determination by flame atomic absorption spectrometry. PV-MGO hybrid material was characterized using field emission scanning electron microscope (FE-SEM, SEM-Mapping), scanning transmission electron microscopy (STEM), energy dispersive X-ray (EDX), Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and Raman spectroscopy. Effects of various parameters such as pH, eluent type, vortex time, amount of magnetic adsorbent were investigated. Under the optimized conditions the MSPE-FAAS procedure presents limit of detection (LOD) of 4.0 mu g L-1, limit of quantification (LOQ) of 13.3 mu g L-1, preconcentration factor of 20 and relative standard deviation (RSD) 4.93%. The accuracy of the method was confirmed by the analysis of the certified reference materials (NCS ZC73032 Celery, CRM025-050 metals on soil, TMDA-64.2 fortified water) and addition-recovery tests. The present method was successfully applied to water, black tea and diet supplements.