Application of Magnetic Porous Carbon Nanosorbent Derived from the Pyrolysis of Magnetic r-MIL-88 for the Extraction and Determination of Polycyclic Aromatic Hydrocarbons in Environmental Samples

In this research, the MPC obtained from the pyrolysis of r-MMIL-88 was applied for preconcentration of two homo and hetero-polycyclic aromatic hydrocarbons. The target analytes were determined by high-performance liquid chromatography with ultra violet detection system (HPLC-UV). Various characterization techniques such as FT-IR spectroscopy, TEM, VSM, and XRD were employed. After that, central composite design (CCD) method was utilized to explore and optimize affecting factors. Applicability of the MPC was explored using dibenzothiophene and 9,10-dimethylanthracene, as the model analytes. Under the optimum condition, LODs and linear ranges were achieved in the domain of 0.05-0.1 µg L-1 and 0.25-500 µg L-1, respectively. Repeatability of the method as RSDs was evaluated which was <7.8% (within-day, n = 5) and <12.5% (between-day, n = 3). Ultimately, the method was applied to analyze well and seawater samples and satisfactory results (RSDs%, 6.7-10.6%; relative recoveries, 94-105%) were obtained. The results of the analysis of real samples showed that this technique can be successfully used to extract and preconcentrate the desired compounds in samples with complex texture.