Synthesis Nanostructure MnMoO₄/NiCo₂O₄ on Graphenized Pencil Lead as Solid Phase Microextraction Fiber for Measurement of Environmental Pollutants in Surface Waters Samples

Abstract

The main goal of this study is the synthesis nano structure MnMoO₄/NiCo₂O₄ on graphenized pencil lead as solid phase microextraction fiber for mensuration of environmental pollutants in surface water samples. In this study, MnMoO₄/NiCo₂O₄ on graphenized pencil lead fiber was synthesized by hydrothermal method and characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy and thermogravimetric analysis. Then its extraction efficiency for polycyclic aromatic hydrocarbons (PAHs) in surface water samples via the HS-SPME method was evaluated. The results revealed that prepared fiber is appropriate for quantitative determination. Identification of adsorbed analytes from the surface of fiber was performed in combination GC-FID. Under the optimized conditions, the linear response for the analytes was observed in the range from 0.001 to 10 µg L⁻¹ with the Correlation coefficients (R²) ranged from 0.998 to 0.983 and the limits of detection (LOD) between 0.2 and 3.8 ngL⁻¹. The proposed fiber was successfully used for the determination of polycyclic aromatic hydrocarbons (PAHs) spiked in surface water samples and RSD% values were obtained in the range of 6.1%–9.6%.

Keywords:

• Head space solid-phase microextraction
• hydrothermal synthesis
• Polycyclic aromatic hydrocarbons
• Nano adsorbent
• graphenized pencil lead

Disclosure statement

No potential conflict of interest was reported by the author(s).