Graphene Oxide Derivatization of Electroless Nickelized Aluminum Surface as a Novel Concept in Fabrication of SPME Fiber: Application to HPLC Determination of Some Polycyclic Aromatic Hydrocarbons

Abstract

Abstract In the present study, a SPME fiber coated with a novel material of nickel/graphene oxide nanocomposite has been introduced for the first time. The prepared sorbent was coated onto the surface of an aluminum wire and employed for the extraction and pre-concentration of some Polycyclic Aromatic Hydrocarbons (PAHs), prior to HPLC-UV analysis. The validation parameters of method were attained under optimal conditions. The technique demonstrated good linearity ranges from 0.50 to 140.00 μg L -1 with squared determination coefficients (R 2) more than 0.98 for all target analytes. The Limit of Detection (LOD) and Limit of Quantification (LOQ) of method were in the range of 0.15 μg L-1 to 1.70 and 0.50 μg L-1 to 5.00 μg L-1, respectively. The fiber-to-fiber intra-day and inter-day relative standard deviations were ranges between 1.80% - 6.73% and 3.19% - 8.05%, respectively. The proposed procedure was applied to simultaneous detection and measurement of the selected PAHs in different food samples and proved the effectiveness of method for routine analysis of them. In addition, the good recoveries for the spiking real samples were more than 89%.