Polyaniline/Graphene Nanocomposite as a Promising Sorbent for Dispersive Solid Phase Extraction of Avermectins from Citrus Fruit Juice

Document Type : Research Paper

Authors

1 Department of Chemistry, College of Basic Science, Yadegar -e- Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad University, Tehran, Iran

2 Department of Chemistry, College of Basic Science, Yadegar-e-Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad University, Tehran, Iran

Abstract

A solid phase extraction sorbent based on polyaniline/graphene nanocomposite is presented. The structure and morphology of synthesized nanocomposite were investigated by Fourier transform infrared spectroscopy, field emission scanning electron microscopy, X-ray diffraction and thermal gravimetric analysis. The dispersive solid phase extraction was employed to the isolation and preconcentration of avermectins insecticide (mixture of B1a and B1b). The extraction procedure was investigated by high performance liquid chromatography-UV detection. The sorbent demonstrated a favorable analytical performance for avermectins detection with reasonable linear ranges (1.5-1000 μg L-1 and 5.0-1000 μg L-1 for B1a and B1b in order) and acceptable detection limits (0.5 μg L-1 for B1a and 2.5 μg L-1 for B1b) under optimized conditions. The extraction efficiency of polyaniline/graphene nanocomposite in the extraction of avermectins was compared with graphene, polyaniline, carbon nanotube and C18 sorbents. Moreover, the applicability of proposed method was assessed for the extraction of analyte from citrus fruit juice.

Keywords


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