3 years ago

Dispersion of magnetic graphene oxide nanoparticles coated with a deep eutectic solvent using ultrasound assistance for preconcentration of methadone in biological and water samples followed by GC–FID and GC–MS

Khosrou Abdi, Mehdi Shafiee Ardestani, Maryam Ezoddin, Navid Lamei


Magnetic graphene nanoparticles coated with a new deep eutectic solvent (Fe3O4@GO-DES) were developed for efficient preconcentration of methadone. The extracted methadone was then analyzed by gas chromatography–flame ionization detection (GC–FID) or gas chromatography–mass spectrometry (GC–MS). Fe3O4@GO-DES were characterized by Fourier transform IR and X-ray diffraction techniques. Ultrasound was used to enhance the dispersion of the sorbent, with a high extraction recovery. Some parameters affecting the extraction recovery, such as pH, type of deep eutectic solvent, sample volume, amount of sorbent, extraction time, and type of eluent, were investigated. Under optimum conditions, the method developed was linear in the concentration range from 3 to 45,000 μg L-1 for GC–FID and from 0.1 to 500 μg L-1 for GC–MS, with a detection limit of 0.8 μg L-1 for GC–FID and 0.03 μg L-1 for GC–MS. The relative standard deviations (n = 6) as the intraday and interday precisions of the methadone spike at a concentration of 100 μg L-1 were 5.8% and 8.4% respectively for GC–FID. The preconcentration factor was 250. Relative recoveries from spiked plasma, urine, and water samples ranged from 95.1% to 101.5%.

Publisher URL: https://link.springer.com/article/10.1007/s00216-017-0547-8

DOI: 10.1007/s00216-017-0547-8

You might also like
Never Miss Important Research

Researcher is an app designed by academics, for academics. Create a personalised feed in two minutes.
Choose from over 15,000 academics journals covering ten research areas then let Researcher deliver you papers tailored to your interests each day.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.