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%.