Milk-Derived Carbon Nanodots for Dispersive Micro-Solid Phase Extraction of Copper at Trace Levels from Vegetable Samples

UZCAN F., SOYLAK M.

Analytical Letters, 2025 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1080/00032719.2025.2465792
  • Dergi Adı: Analytical Letters
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Chemical Abstracts Core, Chimica, Communication Abstracts, Food Science & Technology Abstracts, Metadex, Veterinary Science Database, Civil Engineering Abstracts
  • Anahtar Kelimeler: Carbon nanodots, copper determination, foods analysis, high-resolution continuum source flame atomic absorption spectrometry (HR-CS FAAS), onions
  • Erciyes Üniversitesi Adresli: Evet

Özet

Carbon nanodots were synthesized from bovine milk using a hydrothermal method. In order to investigate the structure of the synthesized material, characterization was performed by Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), and scanning transmission electron microscopy (STEM). The material was used as a nanosorbent for the dispersive micro-solid-phase extraction of copper at trace levels. The quantification of copper was conducted using a high-resolution continuum source flame atomic absorption spectrometer (HR-CS FAAS). The optimal working conditions were a pH of 6.0, a nanosorbent mass of 5 mg, a desorption time of 3.5 min. and a desorption agent of 2 mol L−1 HNO3. The detection limit and limit of quantification were determined to be 0.4 ng mL−1 and 1.2 ng mL−1 respectively, with relative recoveries ranging from 92% to 102%. The relative standard deviation (RSD) was 3.4% and the linear range was from 1.8 to 100 ng mL−1. This method is highlighted for its speed, high sensitivity, and environmentally friendly approach, making it a practical option for detecting copper levels in vegetables.